Hi Everyone,
Due to random readings of my samples, i ran wavelength and photometric accuracy test. Both of them fails, do i need to replace the lamp or is it because of the wavelength drive gear?
thanks.
When doing autotune I get high precursor in mass 502. I get 12.79% and the limit is 12%. The manual says that it could be contaminated. The equipment has had preventive maintenance recently but it has now this problem. Previously it had a ratio of mass…
What likely happened is the wavelength check that is done after lamp ignition failed. When the lamp is switched on, the detector waits 1 minute to warm-up the lamp. Then a check of the deuterium emission line via the reference diode is performed. If the…
If you want to know what specific module is sending a Leak error, this article in the Knowledge Portal can help:
Determining which Module is Causing the Shutdown Error Due to a Leak
The "Valve command failed transport command failed" Error can have…
Anyone have experience with a 7890B causing abnormal signal attenuation and more signal noise than normal? The attenuation problem - the detector's AIB signal has a maximum signal of ~ 69,000 uV however the signal now tops out at ~30,000 uV in the ChemStation…
thanks for your answer. Regarding the ion source (EI): it happens that in a relatively new column, the abundance of the peaks of the same control that I had been injecting almost 3 weeks ago, has decreased from 5 x10^5 to almost 1x10^4. I tried injecting…
Hello pathagun ,
First thing you can double check is if any bubbles are present in the solvent lines between the solvent bottles and the degasser or the pump. You can also check if the solvent inlet filters in the bottles are blocked as these can…
Hi everybody, firstly, excuse me for my english. Please I need a video about how to install AJS and MMI in qtofms 6545, because we have a tune problem when we use MMI, (tune failed). To autotune the system, we need to remove MMI and install AJS. Any suggestions…
The Digest of upcoming webinars has been updated as of January 4.
Notable additions include:
Spectroscopy Digital Workshop & Bootcamp (16)
Check Out:
New Year resolution for my ICP-MS: I will keep my ICP-MS analysis free from contaminants…
Hi Sean...I think I've touched that particular instrument a long time ago. Gary - 50% 28 and 13% 32 after 24 hours is quite a big leak, maybe not massive but certainly needs fixing.
If the system worked fine before it was cooled off for a power fail…
This Information Applies To: Agilent GC Systems
Issue
Excessive baseline noise can be introduced at different points including sample preparation, sample introduction, separation, and the detector. The excessive background can cause reduced signal...
This Information Applies To: Agilent GC Systems
Issue
Baseline instability that is not reproducible across multiple runs can be introduced at different points including sample introduction, separation, and the detector. The baseline instability...
This Information Applies To: Agilent GC Systems
Issue
Peak fronting is present in a chromatography peak when it has an excessive asymmetry with a leading edge. A normal peak is almost symmetrical.
Other chromatographic problems are identified...
This Information Applies To: Agilent GC Systems
Issue
A shift in retention time can occur for single, multiple or all peaks.
Other chromatographic problems are identified in Basic Troubleshooting for GC Systems . Regular maintenance of your instrument...
This Information Applies To: Agilent GC Systems
Issue
A change in peak size can occur for single, multiple or all peaks.
Other chromatographic problems are identified in Basic Troubleshooting for GC Systems . Regular maintenance of your instrument...
This Information Applies To: Agilent GC Systems
Issue
Peak splitting is when a single compound is shown in the chromatogram as two peaks usually unresolved, or one of the peaks is a shoulder.
Other chromatographic problems are identified in Basic...
This Information Applies To: Agilent GC Systems
Issue
This test isolates the point of contamination to the sample introduction system, which includes the gas supply, gas supply lines, and the sample inlet. It does not include the syringe or autosampler...
This Information Applies To: Agilent GC systems
Issue
Peak tailing is present in a chromatography peak when it has an excessive asymmetry with a trailing edge. A normal peak is almost symmetrical.
Other chromatographic problems are identified...
T his Information Applies To: Agilent 8890/8860/7890/7820/6850/6890 GC Systems with TCD (Thermal Conductivity Detector)
Issue
Problems observed with thermal conductivity detector (TCD) results can have different underlying causes.
Resolution...
This Information Applies To: All GCs, 6890, 6850, 7890, 7820, 8890/8860, Intuvo 9000
Issue:
This article is a troubleshooting guide for when the Flame Ionization Detector (FID) does not ignite or the flame keeps going out.
Cause:
If the FID...