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
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 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…
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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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: HPLC Advisor app
Issue
The Agilent InfinityLab HPLC Advisor app is a cost-free mobile app for both Android and iOS.
It offers tools to save time with HPLC troubleshooting, method development, and more. Once installed...
This Information Applies To: Agilent 5977A/B GC/MSD with MassHunter GC/MS Acquisition Software
Issue:
This article describes the procedure to safely pump down (start) 5977A/B GC/MSD with Electron Ionization (EI)
Steps To follow:
Before you...
This Information Applies To: Agilent 5975 and 5977 series GC/MSD
Issue:
Tuning the Agilent GC/MSD with EI sources, requires the use of perfluorotributylamine (PFTBA). The calibration vial will be depleted eventually due to regular use. This article...
This Information Applies To: Agilent 5975 and 5977 series GC/MSD
Issue:
If the PFDTD signal is absent or low, but the reagent ions are normal, you may have run out of CI Calibrant.
Inspect the calibration vial on the back of the flow controller...
This Information Applies To: Agilent 5975 and 5977 Series GC/MSD
Issue:
For some GC/MSD maintenance or repair asks, it is required to open the side plate (filament exchange, ion source cleaning, electron multiplier exchange, column installation...
This Information Applies To: Agilent GC/MS MassHunter Acquisition Software Agilent 5975/5977 GC/MSD
Issue
Use the Early Maintenance Feedback (EMF) tool to track the GC/MSD's consumable resource and part use, and to configure alerts for when they...
This Information Applies To: Agilent GC/MSD systems
Issue:
After a filament fails, there will be a system error message: "No emission current". Switching to the other filament (except for the CI ion source, which has just one filament), and then...
This Information Applies To: Agilent 7693A automatic liquid sampler tray
Issue:
The orange Align Mode light comes on . T he sample tray of the Agilent automatic liquid sampler 7693A will not operate again until the alignment procedure has successfully...
This Information Applies To: Agilent 7693A Automatic Liquid Sampler
Issue:
The automatic liquid sampler may need to be replaced, in case it is worn or dirty.
Steps to follow
To remove the syringe:
Open the injector door.
Slide...
This Information Applies To: Agilent 7693A Automatic Liquid Sampler
Issue:
Two turrets are provided with the 7693A injector, the 16-sample standalone turret, and the 3-sample transfer turret used with the 150-sample tray (See Figure 1 ). The turret...