Instrument FAQs

The complete 1100 stack is a quaternary pump, autosampler, column oven and UV detector. It remains one of the most proven HPLC platforms in Indian pharma QC laboratories, and spares are still easy to source — which is what keeps it economical to run rather than a liability. On this platform we service the pump head, seals, check valves and the detector lamp, and we stock the common wear parts.

The two series share a modular design, so pumps, autosamplers, column compartments and detectors are often combined across the generations. What must be checked is the control software and firmware compatibility for the exact combination, and the condition of the wear parts in each module — pump seals and check valves, the needle and rotor seal in the autosampler, and lamp hours in the detector. Ask us about the specific modules before assuming a mix will run.

Agilent 1100/1200 systems are among the refurbished instruments that move most, precisely because spare parts are available and the software side can be arranged. Judge the unit, not the model name: ask what the pump seals, check valves, needle and rotor seal history is, what lamp hours the detector has, which software will control it, and what installation, qualification and spares support is included in writing. Our refurbished Agilent 1100/1200 page sets out what to ask.

Rising backpressure almost always means a blockage — the analytical column, the guard column or the in-line filter — and the most common cause is precipitated buffer. Phosphate and similar buffers must never be flushed straight into an organic solvent: the salt crystallises and can block the pump, injector and column together. The safe order is buffer, then water, then organic. If the pressure falls or fluctuates instead of rising, look at the pump seal, the check valves or a leak.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Four causes cover most cases: the detector lamp is at the end of its life, there is air or dirt in the flow cell, the mobile phase is not mixing or degassing properly, or the room temperature is changing during the run. Work through them in that order before assuming an electronic fault. Our checklist Diagnosing HPLC baseline noise and drift walks through it step by step.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The 1200 is the next form of the 1100: faster injection cycles and a better detector, while staying fully compatible with 1100 methods — so moving a method across does not force you to revalidate the separation. It is the sensible step when 1100 throughput has become the bottleneck but the methods themselves are settled.

Often, yes — the two series share a modular design, so pumps, autosamplers, column compartments and detectors are frequently combined across the generations. Check the control software and firmware compatibility for the exact combination first, and the wear parts in each module: pump seals and check valves, the autosampler needle and rotor seal, and lamp hours in the detector. Send us the module list and we will confirm.

Rising backpressure almost always means a blockage — the analytical column, the guard column or the in-line filter — and the most common cause is precipitated buffer. Phosphate and similar buffers must never be flushed straight into an organic solvent: the salt crystallises and can block the pump, injector and column together. The safe order is buffer, then water, then organic. If the pressure falls or fluctuates instead of rising, look at the pump seal, the check valves or a leak.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Four causes cover most cases: the detector lamp is at the end of its life, there is air or dirt in the flow cell, the mobile phase is not mixing or degassing properly, or the room temperature is changing during the run. Work through them in that order before assuming an electronic fault. Our checklist Diagnosing HPLC baseline noise and drift walks through it step by step.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

Yes. The 1260 Infinity is rated to 600 bar, which gives UHPLC-class speed, but it still runs conventional HPLC columns — so existing methods keep working while new ones can be made faster. It runs under OpenLAB CDS. On this platform we handle installation, IQ/OQ/PQ qualification and AMC.

The 1260 Infinity II is a modular platform that supports UV, PDA (diode array), fluorescence and RI detectors, which is what makes it suit laboratories that need flexibility across several methods. PDA matters where you need spectra at every point of the run — impurity profiling and peak purity; RI is for compounds that do not absorb UV, such as sugars and polymers; fluorescence is for very low concentrations.

Yes — installation, IQ/OQ/PQ qualification and AMC are the services we provide on this platform. Installation Qualification confirms the instrument is installed as specified, Operational Qualification that it performs to specification, and Performance Qualification that it does so under your own methods and conditions. Our guide Understanding IQ/OQ/PQ qualification explains what each phase verifies and why auditors ask for all three.

Rising backpressure almost always means a blockage — the analytical column, the guard column or the in-line filter — and the most common cause is precipitated buffer. Phosphate and similar buffers must never be flushed straight into an organic solvent: the salt crystallises and can block the pump, injector and column together. The safe order is buffer, then water, then organic. If the pressure falls or fluctuates instead of rising, look at the pump seal, the check valves or a leak.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Four causes cover most cases: the detector lamp is at the end of its life, there is air or dirt in the flow cell, the mobile phase is not mixing or degassing properly, or the room temperature is changing during the run. Work through them in that order before assuming an electronic fault. Our checklist Diagnosing HPLC baseline noise and drift walks through it step by step.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

Yes, for routine work. Despite its age, spares and columns for the 6890 series are still commonly available, which is exactly why it remains a sensible buy rather than a risk. It is supplied with FID or TCD. On this platform we service the inlets, the detectors and the EPC (electronic pneumatic control) modules.

Yes. A 6890 GC paired with a G1888 headspace sampler is a matched pair for residual solvent work: USP <467> methods run on it directly, with no rebuild of the inlet path. It is a practical way to bring OVI testing in-house without the cost of a new system. For residual solvents under ICH Q3C, a headspace sampler is used with the GC almost always.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The 7890B is a flexible GC that takes up to two inlets and two detectors, which suits laboratories running several methods on one instrument. Its electronic pneumatic control holds retention times very stable — what matters when a method has to stay comparable across a long sequence.

Retention times drifting point to the carrier gas flow or a leak — check the gas supply, the inlet septum and the column connections first. On the 7890B the electronic pneumatic control is what holds retention stable, so a shift usually means something upstream of it has changed: a leak at a ferrule, a septum past its life or a gas purifier that needs replacing. Ghost peaks point instead to a dirty septum or liner.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

No. The 8860 is a compact GC built for tight benches and is driven entirely from a browser, with no separate workstation to buy, license or qualify. That makes it the cleanest choice for routine QC where both bench space and IT overhead are real constraints.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The 8890 runs two channels at once and reports its own health, so a developing fault becomes visible before it stops a run. In laboratories with long overnight sequences this is the configuration that loses the least time to unplanned downtime.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

For volatile compounds that you do not want to inject as liquid. In pharma the main use is residual solvent testing under ICH Q3C and OVI methods: the sample is heated in a sealed vial, the vapour above it is transferred to the GC inlet, and the GC separates and measures the solvents. For residual solvents, a headspace sampler is used with the GC almost always.

Yes. The TurboMatrix HS 40 is on our supported-instrument list because we hold its service documentation — the list on this site is counted from the manuals our engineers actually work from, not written from memory. Tell us the model, the serial number and what the sampler is doing, and an engineer who works on it will answer.

Start on the GC side before the sampler: ghost peaks usually mean a dirty septum or liner, retention times drifting point to the carrier gas flow or a leak, and a climbing baseline is column bleed. The consumables to check are septa, liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column. If the GC checks out, the transfer line and vial heating on the sampler are next.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The GC-2010 Plus is a high-end GC with Advanced Flow Control, and its column bleed is very low. That makes it the right instrument for trace-level work, where the baseline itself sets your detection limit rather than the detector.

Shimadzu's chromatography software is LabSolutions, which is very widely installed in India across the GC-2010, GC-2030 and Nexis GC families. Tell us which version your laboratory runs and whether the PC is part of the enquiry, because the software side is a separate item from the instrument in any quotation.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

It is a straightforward, robust GC supplied with FID, TCD or ECD as the work requires — the workhorse of routine testing laboratories. It is simple enough that most faults are field-repairable on site, instead of going to board-level replacement.

FID is the general-purpose detector for anything carbon-based and the most common choice. TCD is used where FID cannot respond, ECD is the detector for halogenated compounds, and NPD exists for nitrogen and phosphorus compounds. For residual solvents (ICH Q3C) and OVI testing in pharma, a headspace sampler is used with the GC almost always. Tell us the method and we will confirm which configuration your work needs.

Septa, inlet liners, ferrules, the gas purifier or trap, the syringe, the FID jet and the column are the consumables. Ghost peaks usually mean a dirty septum or liner. Retention times drifting point to the gas flow or a leak. Peak tailing means the liner has become active and needs deactivating or replacing. A baseline that keeps climbing is column bleed — the column is ageing or being run past its temperature limit. For choosing a replacement column, see GC column selection for routine analysis.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

It is a physical error: the instrument counts the pump's rotation with a U-shaped optical sensor sitting over a black disc with a cut-out, and that count is how it measures flow. When the count is missed — or the motor never turned — you see "no pump home". Check, in order: is the disc rubbing or off-centre in the sensor gap; is the sensor itself dead; is the pump drive board passing the signal on; and finally the main board, where most pump errors on this instrument end up. Our guide Shimadzu LC-2010C HT pump problems is written from our own bench work.

High pressure is the most common pump error on this system. Work from the easiest thing to the hardest: a blocked line filter first (cheap and quick to change), then the inlet and outlet check valves, then the pump seal. A bad check valve rarely fails cleanly — it shows up as pressure fluctuation. A worn seal leaks at the pump head, so flow drops while the pressure reading goes wrong. If purging does not clear the line, suspect a trapped air bubble: degas and purge again before looking for a mechanical fault.

The LC-2010C HT houses the pump, degasser, autosampler, column oven and UV detector in one body instead of a stack of modules. That means a smaller footprint and one service point, but also that the whole instrument is affected when one section needs attention. For a QC laboratory short on bench space it is the most dependable integrated HPLC we service — and the platform our engineers know best.

Three things, ten minutes, and they resolve a good number of cases: change or clean the line filter; degas the mobile phase and purge properly; and open the left side panel of the pump section to see whether the disc is centred in the sensor gap. If the pressure is still unstable or "no pump home" is still showing after that, the fault is deeper — sensor, drive board or main board — and it needs someone with the parts and the meter in hand.

Our refurbished catalogue lists a Shimadzu LC-2010C HT that was function-checked across the pump, autosampler and detector before listing and carries a 6-month warranty. On any refurbished unit of this model, check the autosampler needle and rotor seal, the pump seals and check valves, the lamp hours and the oven heating, and ask for the qualification documents that will be supplied. A listing is information, not a stock confirmation — confirm the specific unit with us.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The LC-2030C Plus is Shimadzu's integrated i-Series HPLC — the same platform sold under the Prominence-i and Nexera-i names. The Nexera-i LC-2030C is the UHPLC version rated to 130 MPa; it runs its own diagnostics before a method starts, so a developing problem is caught at the beginning rather than halfway through an overnight sequence. Shimadzu's chromatography software for these systems is LabSolutions. Tell us the exact designation on your instrument's label when you enquire.

A single-wavelength UV/Visible detector is the most common and is enough for assay work. A PDA (photodiode array) records many wavelengths at once, which is what impurity profiling and peak-purity checks need: from a single injection you can tell whether a peak is one compound or two. If related-substances and method-development work are part of the laboratory's routine, the PDA is the one to specify; tell us the methods and we will confirm which configuration fits.

Rising backpressure almost always means a blockage — the analytical column, the guard column or the in-line filter — and the most common cause is precipitated buffer. Phosphate and similar buffers must never be flushed straight into an organic solvent: the salt crystallises and can block the pump, injector and column together. The safe order is buffer, then water, then organic. If the pressure falls or fluctuates instead of rising, look at the pump seal, the check valves or a leak.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Four causes cover most cases: the detector lamp is at the end of its life, there is air or dirt in the flow cell, the mobile phase is not mixing or degassing properly, or the room temperature is changing during the run. Work through them in that order before assuming an electronic fault. Our checklist Diagnosing HPLC baseline noise and drift walks through it step by step.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The UV-1800 is a double-beam UV-Vis covering 190–1100 nm. Pharmacopoeia validation programs are built into the instrument, so IQ/OQ/PQ runs on it directly. We carry the deuterium lamp for it and, as part of calibration, perform the wavelength accuracy, photometric accuracy and stray light checks. Our guide Understanding IQ/OQ/PQ qualification explains what each phase verifies.

Wavelength accuracy is checked with a holmium oxide filter or the emission lines of a mercury lamp; absorbance (photometric) accuracy with a potassium dichromate solution; stray light with potassium chloride, sodium iodide or sodium nitrite solutions; and resolution with toluene in hexane. These are the checks customers ask about at audit time, and the ones we document during calibration.

The usual causes are ordinary: the lamp is at the end of its life, there are fingerprints on the cuvette (the most common cause, and the most avoidable), a baseline was not taken before the measurement, or the solution itself is turbid or dirty. The UV range (190–380 nm) comes from the deuterium lamp and the visible range (380–1100 nm) from the tungsten-halogen lamp, so which region is affected tells you which lamp to suspect.

Our refurbished catalogue lists a Shimadzu UV-1800 in excellent condition, wavelength-calibrated and function-tested before listing, with a 6-month warranty — suited to routine QC laboratories. A listing is information rather than a stock confirmation, so ask us about the specific unit, the documents supplied with it and the installation arrangement.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The 2489 is a dual-wavelength UV/Visible detector — it monitors two wavelengths at once, which lets assay and related-substances work run on one instrument. On the Alliance it is commonly paired with the e2695 separations module, and it runs under Empower, so it drops into an existing regulated workflow without a new chromatography data system.

A deuterium lamp gives roughly 2000 hours of use. The signs are a baseline that becomes noisy or drifts and a falling lamp energy — though air or dirt in the flow cell produces the same symptoms, so check the cell before ordering a lamp. The checklist in Diagnosing HPLC baseline noise and drift separates the two.

The detector is one of the five places where almost every HPLC fault sits, and on the detector it comes down to two things: the lamp at the end of its life, and air or dirt in the flow cell. A service visit checks lamp hours and flow-cell cleanliness alongside the pump, injector, column and degasser of the system it is connected to.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The 2998 photodiode array sees 190–800 nm and records a full spectrum at every point of the run instead of one wavelength, so peak purity and impurity profiling can be assessed from a single injection. That matters for related-substances and method-development work in pharmaceutical laboratories, where the question is usually whether a peak is one compound or two.

Confirm the flow cell condition, the lamp hours and that the spectra are clean, because air or dirt in the flow cell shows up as baseline noise and drift. Describe the HPLC system the detector will sit in, the software environment and the intended application, and ask for the checks documented for the offered unit rather than assuming every refurbished detector has the same history.

On the detector side it is the lamp at the end of its life (roughly 2000 hours for a deuterium lamp), or air or dirt in the flow cell. Beyond the detector, a mobile phase that is not mixing or degassing properly and a changing room temperature give the same picture. Our checklist Diagnosing HPLC baseline noise and drift works through them in order.

Send the brand and full model, the serial number (spares and warranty are tied to it), what the instrument is doing in your own words — "pressure is rising", "no peak" — since when and whether it started suddenly, any error message on the screen, when the last preventive maintenance or calibration was done, and whether the unit is under warranty, under an AMC or a paid visit. We do not promise a fix before seeing the instrument: one pressure complaint can have five different causes.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.

The e2695 is the newer form of the Alliance separations module, with better seal life and lower carryover than the 2695 it replaces. Seal and plunger wear is the fault we see most on this family, and we stock those parts. Both run under Empower, so either drops into an existing regulated workflow without a new chromatography data system.

Ask which detector it is paired with (a 2695 is commonly supplied with a 2996 PDA or a UV detector), what the pump seals, check valves, plungers, rotor seal and needle seat history is, whether the column heater and degasser are working, and what installation, qualification and spares support is included in writing. One more thing to settle up front: the Empower licence is a separate cost from the instrument, and it is better known before the deal than after. See our refurbished Waters 2695 page.

The Alliance thermostatted autosampler stays stable through an overnight sequence, so the last injection is still comparable with the first — which is what makes an unattended run worth setting up at all. If results drift across a long sequence, check the autosampler temperature and the injector's needle and rotor seal before suspecting the column.

Rising backpressure almost always means a blockage — the analytical column, the guard column or the in-line filter — and the most common cause is precipitated buffer. Phosphate and similar buffers must never be flushed straight into an organic solvent: the salt crystallises and can block the pump, injector and column together. The safe order is buffer, then water, then organic. If the pressure falls or fluctuates instead of rising, look at the pump seal, the check valves or a leak.

The predictable ones: the deuterium lamp in the UV detector (roughly 2000 hours of use), pump seals, pistons and check valves, the injector rotor seal and needle seat, in-line filters and solvent frits, the guard column, PEEK and steel fittings, ferrules, vials and septa. These are the parts that come up on service visit after service visit, and the ones worth keeping on the shelf.

Four causes cover most cases: the detector lamp is at the end of its life, there is air or dirt in the flow cell, the mobile phase is not mixing or degassing properly, or the room temperature is changing during the run. Work through them in that order before assuming an electronic fault. Our checklist Diagnosing HPLC baseline noise and drift walks through it step by step.

Yes. Vision Analytical is based in Ambernath in Thane district and has worked with laboratories across Maharashtra and Gujarat since 2016, including Mumbai, Thane, Navi Mumbai, Pune and Ahmedabad. When you enquire, share the laboratory address and the instrument's full model name. Coverage does not mean a branch office or a guaranteed response time in every city — scheduling is confirmed directly with you.

An AMC covers the engineer's visits and labour — typically two preventive visits a year plus breakdown calls — with spare parts charged separately. A CMC is comprehensive: the wear parts are included too, although items such as lamps, columns and glassware are often excluded and the contract wording decides. Calibration is scheduled every 6 or 12 months according to your own SOP, not ours. Our article AMC vs CMC: what's the difference? goes through how to choose.