Hi all,
I am currently troubleshooting a leaky 1260 infinity II HPLC-SFC-ELSD and want to carry out a leak test in the utility program, but i could not find a clear, detailed description on how to do this. Could anyone direct me to the correct resource…
Hi there, I noticed recently that the ECD back signal on Agilent GC 7890 (using it for trace gas analysis) is oddly spiking (while the FID is a straight, consistent line). It never used to do this. I just recently changed the inlet septum, could this…
Hi Community
I have an Issue on one of our GC-FIDs 6890N. I have large Peak Tailing, especially on the back of my chromatogramm:
What i already did:
- New Column
- New Septa/liner
- New Gold Plate
- Cleaned Inlet and Detector
- Re…
the abundance of ion 69. I rechecked the source and it doesn't look dirty. then I did an autotune it stopped on the width mass axis of the second quadrupole.
Finally, after 2 or 3 more attempts, I ended up completing the autotune with an abundance of…
*The system and method are given at the bottom of this post*
I am working with an Agilent 8860 operating a DB-624 UI (30m x 0.25mm x 1.4um) column with nitrogen carrier gas and split inlet (20:1). The system was shut down for approximately 1 year, and…
Any special procedures to prepare for cross-country shipment a 7890B with SS, PP inlets, heated valve oven, and TCD-FID? Also a 7697A with 100-vial tray?
Turning off the systems on Friday night that need to be ready to go on Monday morning is not recommended. It can take quite some time for a GC/MS to come back up to operational after being shut down. Even cooling the temperatures all down and then heating…
I have a Cary 3500 and running Cary UV Workstation Software 1.2 and Windows 10
I downloaded the new Cary UV Workstation Software 1.3 via the Agilent SubscribeNet.
first I ran the systemPreparationTool.exe
That finished without issues.
Then I ran…
I have a gas-phase reactor system that uses the FID of a 7980A to analyze the product mixture. Currently, I have a pressure buildup (up to 30 psi - the carrier gas delivery pressure) when the system is stationary. When the gas sampling valve actuates…
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...