Hi, Here's a screenshot of the system suit, there is no blank subtraction The analyst said he has used the same processing method for a different run with no issues the only difference being that for those runs the MS setting was the same time as the…
The basic tools I would recommend to have for GC maintenance:
Ceramic column cutter
1/4" wrench (column nuts)
7/16" wrench (gas fittings at back of GC)
1/2" wrench (replace gold seal on S/SL inlet)
Torx 20 driver (removing FID collector assembly…
When you say that there are no signs of a leak, have you run a pump leak rate test using Agilent Lab Advisor? If not, I would suggest testing this. If you're unlucky enough for your peak to elute just at the point when the outlet ball valve fails to close…
Agilent GC 7890A, FID, Split Liner. I'm setting up the column to do Hexane injection testing. It was set up this way previously but the program had been deleted and the column removed before I started here. Front Detector/Column which is below baseline…
Hello and Help!
My GC-FID's inlet pressure stays at 0.7 psi and does not reach the setpoint of 10 psi. Makeup gas reaches the 25 psi setting. Liner and septa are fine. I unscrewed the inlet column nut and placed my finger at the bottom of the inlet…
Hello,
My laboratory runs a multilevel calibration with internal standards on a headspace-GC-FID. Our sequence is set up to replace each level of the curve after each calibrator is analyzed and then calculate the concentration of the analyte with the…
I'm going to be calibrating for ethanol on my HS-GC-FID 6890, but I'm having discrepancies between two standards. The standard that I will be calibrating with (Restek's Residual Solvents #1 34105) is 3000ug/mL in N,N-Dimethylacetamide. I'm verifying the…
Hi Dr. Know
Here is some of the information you have requested. Please let me know if you need any further info.
How is your system configured? FID detector using helium as carrier gas, nitrogen as makeup gas.
Which phases are the two columns…
Hi
I am pretty new to GCMS, so may need extra details on how to do things you suggest
I attached a picture of the set up of our gc system, so I can explain better. We recently installed a guard column using 30 cm piece of FS Deactivated 0.250 mm(Agilent…
First of all, thank you for posting publicly, I had not noticed this interface feature of MassHunter Quant, it looks very useful.
Were you able to get it working in 11.1?
If you're allowed to share your "IScriptable" folder, I would be very interested…
This Information Applies To: Agilent Liquid Chromatography (LC) systems
Issue:
Shutting down the HPLC for a long period requires following this general procedure to prevent damage to the system and the column.
Steps to follow:
Store the...
This Information Applies To: Agilent G7129A/B Autosampler with Sample Thermostat/Cooler G7167-60101 or G7167-60005.
Issue:
The autosampler may stop working from time to time, potentially giving off loud noises and switching off the light. The only...
This Information Applies To: Agilent 5977A/B GC/MSD with EI source, EI Extractor Source, or CI Source.
Issue:
During normal operation of the GC/MSD, the source will require cleaning. It is time to clean the source when:
There is a loss in analyte...
This Information Applies To: Agilent HES source, Agilent 5977 Series GC/MSD
Issue:
During normal operation of the GC/MSD, the source will require cleaning. It is time to clean the source when:
There is a loss in analyte response not improving...
This Information Applies To: Agilent 5977 and 5975 Series GC/MSD systems
Issue
The autotune fails and reports the error Tune action stopped: Gain and offset = 0 and peaks are too narrow!
Resolution
The MSD autotune program is run after routine...
This Information Applies To: Agilent ICP-MS systems (7700/7800/7850/7900/8800/8900)
Issue
Condition new or cleaned ICP-MS skimmer cones and sampler cones by aspirating a Conditioning Solution before use.
Background
Drift up can be a sign of...
Turn On the GC/MS Interface and Oven Using OpenLab CDS
Multiple Results
This Information Applies To: Agilent GC/MS instruments controlled by OpenLab CDS software
Issue
Turning on the GC/MS interface heater and Oven using OpenLab CDS software.
Steps to Follow
From the Home tab, click Method > Instrument Setup...
This Information Applies To: Agilent ICP-MS systems (7700/7800/7850/7900)
Issue
The signal monitor function in MassHunter can help with troubleshooting low sensitivity, carry over, contamination, or high background. It can also be used to optimize...
This Information Applies To: Agilent UV detectors (Variable Wavelength Detectors, Multiple Wavelength Detectors, and Diode Array Detectors)
Issue
Checking accumulated hours on the UV lamp.
Steps to Follow
There are four ways to check the accumulated...
This Information Applies To: Agilent 7700/7800/7850/7900/8800/8900 ICP-MS
Issue:
Poor internal standard (ISTD) mixing can cause high relative standard deviation (RSD).
The recommendations in this article are applicable if:
It takes a long...