Hi,
I am having trouble with carryover peaks in baseline in my 7890B GC with micro-ECD detector. To be specific, the baseline shows kind of a s-shaped just right before our peak of interest begins to appear which interferes with the peak shape.
A…
Hello Marty,
We decided to re-install Chemstation software on a newer Dell Optiplex computer. This worked! So we are back in business! Our LC is now allowing all lab analysts to log back into Chemstation after it times out from inactivity.
Thank you…
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Overloading and too high a signal are slightly different. Inlet, column, ion source, and electron multiplier overload can happen even if the maximum signal output is less than the 2x10^6 recommended highest ion signal. Peaks that are too big cause issues…
Good day. What is the best way of protection сystine during acid hydrolysis? I have used the most of preservatives such as: citric acid, phenol. decrease hydrolysis time. No one mentioned above give results. Also I am interested in tryptophan sample …
In that acqmeth.txt file...the column flow setpoints for both columns are set to "Off" ? Please make sure that both are checked ON and save the method.
They don't say the control type - Constant Flow is typical. What version of MassHunter Acquisition…
Hello,
The newer CDS 2.x software does not have that ability to run partial sequences into the same result set as Chemstation did in the past. Also, the new software does not have a single online session per instrument. If a second users needs to…
Hi James,
I am having sort of similar issue as nbrow12 has had 4 years ago. My system is a 7890A GC. I am getting PCM C flow shut down. I did a leak check around inlet, no leak was detected. I can not find out solution on my own. Please advise. Thanks…
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...
This Information Applies To: Agilent GC Systems with Flame Ionization Detector (FID)
Issue:
The Flame Ionization Detector (FID) jet could become clogged with ferrule material, column bleed, or heavy molecular analytes. The clogged jet will affect...
This Information Applies To: Agilent GC Systems with Split/Splitless (S/SL) inlet
Issue
Different liners are required for different high concentration, split analysis techniques including:
General use liners
Auto inject, general use
Auto...