Hello All, Not certain if this is the proper location for such a question, so please feel free to indicate the correct location if I am in error. Issue: Difficulty with GC Chromatography and irreproducible injections - Specifically, the chromatography…
1.0 What is the significance of detector noise during GC calibration 2.0 What is the impact if it fails 3.0 What is the difference between signal to noise ratio and detector noise and drift
Hello everyone! We have a Lc MSD VL G1956A single quad. In the past, at some point we had problems with the acquisition of MS. We had lost the MSd signal. Now it's worse. It is impossible to make acquisitions with MS.
The equipment is under maintenance…
Hi Norbert Thank you for your quick response. As you said we are using a GC Agilent 7890 with a Agilent headspace. We have an issue with the RSD. The first 5 injections are really good but after inject a sample the next STD injection to close the run…
This collection of "best of" resources directs you to user manuals , reference guides , videos , and application notes for Agilent gas chromatography/mass spectrometry (G C/MS ) products on Agilent.com . Available resources about JetClean and QuickProbe…
I have an Agilent 7890A GC-FID with dual split/splitless inlets and detectors configured with a 0.53 mm ID capillary column. My instrument keeps giving me the message "front inlet pressure, system shutdown". The front inlet cannot maintain pressure and…
Maintenance have been done on the P&T, the buller is cleaned, the trap have been change in august 2016, moisture trap in december 2016. The method we're using is the method used here over years...Never had this kind of problem... The GC column had been…
Hi, Thank you for your replies. We had some assistance by email from Agilent and we checked several points. We changed the EM horn and cleaned the HED. The clip that holds EM horn seemed to be fine. We also ran several tests from the Lab device toolkit…
"No Emission Current" -- This message just says that the filament is not working.
Wait long enough after pumping down. Don’t turn on the MS to just ‘take a look’ to see how the pump down is going. The residual oxygen damages the filament immediately…
Hello I am using Chemstation version B.04 and I recently found the mentioned macro. However, it does not seem to properly work. First, it failed at the Revision, therefore I took a look at macro file and found out supported versions were only previous…
This Information Applies To: All Agilent Gas Chromatographs, 6890, 6850, 7890, 7820, 8890, and 8860.
Issue:
A quick reference guide on the capillary column installation for the GC.
Inlets
Detectors
Split/splitless inlet Purged...
How to Add a GC Instrument in Agilent OpenLab CDS (Ver 2.x)
Multiple Results
This Information Applies To: Agilent OpenLab CDS (Ver 2.x)
Content:
The following procedure shows how to add a GC instrument in OpenLab CDS (Ver 2.x).
Steps to Follow:
1. Open OpenLab CDS Control Panel, in the Instruments interface, select...
This Information Applies To: Agilent Intuvo 9000, 8860, 8890, 7890A/B, 7820A, 6890, 6850 GC Systems with Split/Splitless, or Multimode Inlets.
Issue:
This article describes how to replace the inlet septum for Split/Splitless and multimode inlets...
This Information Applies To: Agilent GC Systems
Issue
The data rate determines the number of sampling points across the chromatographic peak and the sample background. The data rate is based on the width of the analyte speak (in minutes) and 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...