Hi Lars, I would add an input from my experience that H2 carrier gas may cause some chemical reactions on some specific polar columns and compounds. Two scenarios I have encountered were (1) analysis of C4-C5 olefins on an AL2O3 PLOT column where some…
I get a bunch of junk on the front panel of the GC and the detectors I have (PID and FID) end up going cold. It is a bunch of work to re-calibrate due to software stuff we have to do for the method we are running. Plus the 1/2 hr runs I do take a while…
Hi Azrael, Publication Part Number: A02028 might be one of several apps to look at. if you could elaborate which targets are nice but not required for quantitation? It appears that Argon is the carrier and sample prep diluent gas then, though He/H2 are…
Hi All,
For the last 1.5 years, the pump has been running fine even though the rear seal wash was blocked. Then in September, we were having issues with our pumps and found there was leaking in pump B. We did a maintenance, meaning cleaning the pumps…
Hello, SW: MassHunter Workstation, Quantitative Analysis, Drug Analysis for GC, Version 10.1 Build 10.1.733.0 I am trying to batch process data acquired by GC-FID but I unable to generate the correct sample result since I don't know where to enter the…
Hello, I have a TCD + FID GC 6890. Need to upgrade to Windows 10, because Windows will no longer provide security updates for Windows 7. Is Chemstation B.04.03 compatible with windows 10? Alternatively, will A.10.02 be compatible with GC6890? Thanks for…
I have been operating an 7890A/5975C with Chemstation version E.02.00.493 for a couple of years. The autosampler is a Gerstel MPS2 (model MXY-02-00B) controlled by Maestro version 1.10[017] and the GC has an FID in the front detector position. I have…
Hello,
we want to analyse a gas mixture (CO2, CO, propane, ethane and methane in hydrogen) with the HP 6890 Series GC System (G1540A). The gases are coming to the column via a six-way valve and after the column, there is a TCD and a FID detector. In…
I have configured my laptop to our 8890 GC with a split/splitless inlet and FID. I am currently just doing manual injection. When sending the method from my laptop to the instrument, all of the parameters reach the setpoints except for my column temperature…
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...