When doing autotune I get high precursor in mass 502. I get 12.79% and the limit is 12%. The manual says that it could be contaminated. The equipment has had preventive maintenance recently but it has now this problem. Previously it had a ratio of mass…
Hi Ive got a Varian 979 leak tester, however after a few runs the fine leak test does not work. If I use "Read standard Leak" then after it fails to switch on fine leak test. Can you please point me in the correct direction. Thanks John
Hello pathagun ,
First thing you can double check is if any bubbles are present in the solvent lines between the solvent bottles and the degasser or the pump. You can also check if the solvent inlet filters in the bottles are blocked as these can…
Anyone have experience with a 7890B causing abnormal signal attenuation and more signal noise than normal? The attenuation problem - the detector's AIB signal has a maximum signal of ~ 69,000 uV however the signal now tops out at ~30,000 uV in the ChemStation…
Hello,
From the error code this look like error 5 with red light 2 and 4 on. Axis movement failed. Either something is blocking the X movement or there is a problem with the sensor. This will require repair. Please call the response center to get…
thanks for your answer. Regarding the ion source (EI): it happens that in a relatively new column, the abundance of the peaks of the same control that I had been injecting almost 3 weeks ago, has decreased from 5 x10^5 to almost 1x10^4. I tried injecting…
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New Year resolution for my ICP-MS: I will keep my ICP-MS analysis free from contaminants…
Hi Sean...I think I've touched that particular instrument a long time ago. Gary - 50% 28 and 13% 32 after 24 hours is quite a big leak, maybe not massive but certainly needs fixing.
If the system worked fine before it was cooled off for a power fail…
Hello lperry ,
The document below explains what that error is, essentially it could be that an ALS is not ready for injection, or some other piece of hardware connected to the GC.
6890 GC Not Ready Messages (agilent.com) (bottom of page 9).
…
Hello,
Our lab currently uses a headspace-GC-FID to analyze for ethanol in blood samples. We have a multi-level, internal standard calibration curve as well as control samples at various concentrations that are analyzed in a sequence. Is there a way…
This Information Applies To: Agilent 7697A Headspace Sampler
Issue:
There is a potential leak external to the Headspace unit that can cause loss of pressure.
Steps to Follow:
This article is a troubleshooting guide for when you suspect there...
This Information Applies To: Agilent 7693A Automatic Liquid Sampler
Issue:
This document explains how to replace the syringe carrier assembly in case you want to change from standard to high volume syringes, or if an Agilent support representative...
This Information Applies To: Agilent 8890/8860 GC Systems
Issue
Early Maintenance Feedback is a useful feature on Agilent GC Systems and software that allows a user to monitor the maintenance needed on their GC. This feature allows for users to...
This Information Applies To: Agilent 8890/8860 GC Systems
Issue:
This procedure outlines the steps to view and clear the maintenance warnings on based on Agilent 8890/8860 GCs. You can also follow the onscreen instructions to perform maintenance...
This Information Applies To: Agilent 6000 Series LC/MS systems equipped with Agilent MS-40+ rotary vane pump.
Issue
Regular check of the rough pump fluid level in your MS40+ pump as part of regular 6000 LC/MS system maintenance checks.
Steps...
This Information Applies To the Following Products : All Agilent iFunnel and Agilent Jet Stream (AJS) 6400 Series LC/MS triple quadrupole systems, Agilent 6460A/C, 6470A, 6490A, and 6495A/B/C
Issue:
As LC Triple Quadrupole Mass Spectrometers (LC...