Hello Samehalsharawy ,
Can you please elaborate on the statement we uninstalled the cylinder expecting the flow to come down to zero but it didn't. It stayed at 50?
If no physical tank is connected to the GC, the GC gas connections are capped…
I was experiencing ghost peaks in my water blank shots so I decided to do some maintenance. This included a new S/SL liner and septum, removing the first inch or two of the column, FID disassembly and ultrasonic cleaning of the jet, and reassembly. Now…
Hi, thank you for your reply.
I am trying to process metabolomic sample .d files generated from an LCMS-QTOF. I did not get this problem a month ago, however, to solve other problems with permissions I had to uninstall and reinstall profinder.
I have…
I have a problem with my FID on a HP-4890d Gas Cromatograph.
The FID was working as normal, then the FID didn't start, so I checked the gas flows, and the H2 didn't come out from FID.
I suspect maybe the Hydrogen pipe line is clogged or the on/off…
Learn about how to inspect the torch, bonnet, shield plate, and RF Coil, as well as torch cleaning and handling recommendations for Agilent ICP-MS systems.
Preventative and regular maintenance are crucial in avoiding ignition issues and plasma instability…
Hi all,
We have a 5975 MSD that is failing to pump down. The turbo pump (Pfeiffer HiPace 300) does not appear to be spinning up, though the turbo pump electronic drive unit has power and is displaying LED light activity. The rough pump has been serviced…
A customer has the MP-AES 4200 for soil analysis but recently started to have a problem with the ignition of the plasma or keeping the plasma on. The customer reported that was a problem with the exhaust system or the inlet fan (cooling system). I checked…
BioConfirm was not designed as a proteome search engine. Searching for proteins using intact mass may not work since the proteome databases are based on DNA reads and include signal proteins/peptides removed from the expressed protein and the fasta file…
Why noise? I don't see a problem with noise.
With regards to the failed drift results, officially the test is to be run with a flow rate of 0.5 ml/min.
Hi Guys, I have a 7980B GC with an external injection valve and FID detector. I am using OpenLab CDS Chemstation Version C.01.09 with Windows 10 (version 1703). Sometimes while running a sequence it fails to save the chromatogram. When you select the…
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...