Log in to follow, share, and participate in this community. Not a member? Join Now! Good morning, we have a GC-MS with a DB-HeavyWax Column. Yesterday we changed the column for a new one (the same). The retention times of our samples shifted 8-11 min. Now, the peaks appear 8-11 min later. We are usi... Hello, I am injecting ethanol samples by direct injection which contain trace amounts of methanol and notice the methanol peak varies injection to injection on the same sample. I also injected pure air (empty ... Hi, GC-MS:7890B/5977B I am injecting 0.2, 0.4, 0.6, 0.8, 1.0 uL/mL solutions of 1-octanol to verify GC-MS system for linearity. Besides improper solution preparation, what else can I do to improve the the injection ... Hello Agilent, One of my colleagues has ordered a replacement actuator (part.no.: 19325-60660) for activating a two-position 10-port rotary valve for GSV injection on a 7890B gas chromatograph. The old actuato... I'm doing Injection Sensitivity test for GC using FID Performance Evaluation Sample Kit. I'm not using an Integrator, I'm using ChemStation. I know that the typical amount obtained using ChemStation is around 4000 pA*... Hello Agiilent, Where do we find information regarding the latest available Agilent instrument firmware revisions for download? Best regards - Lars Hi everyone. I have a Agilent 6890 with ALS, and I have problems with the EPC. The message that display is : Pneu Error 0158 PCB Cmd Error: 2003 Anyone knows how to fix this? Best Regards. We analyzed effluent samples via our GCMS system paired with an ATOMX purge and trap. All of a sudden, we have noticed a big increase in certain compounds concentrations and can't explain why. Typically, we make thre... If I have a 2 m precolumn, when I introduce the length of the column in my instrument method, do I have to add to my principal column length? p.e. Precolumn length 2 m, column 15 m, total 17 m What if the precolumn h... See pic below. We use a HS-GC/MS for biological specimens. I recently did some method development and noticed that the unretained species is tailing so bad that my early eluter target is out of acceptance criteria. I ... GC USP Alcohol method for methanol limit test injection had retention time shift from 3.5 minutes with ~10M area counts to 20 minutes with area count 700K. Checked or replaced liner/O-ring, septum, carrier gas fl... Hello, I would like to know how many injections were made on a 7820A Agilent GC between 2 dates. Is there a way through the software (Openlab CDS Chemstation GC Agilent) to find this information? Thank ... The menu "Inlets Maintenance" (Maintenance/Front Inlet) is showing ALS counters after upgrading Agilent GC 8890 to firmware to v18.104.22.1686. Pressing the "Perform Maintenance" link text only allows for "Replace Syringe"... Hello! I have a qustion. how can i see the supply voltage on the module PSI ? Azrael Hello everybody! GC MS (7000C triple quad) shows error "1.17 MS1 RF driver cannot maintain the requested mass setting" when we perform EI high sensitivity autotune and ms goes to standby mode. We finally performed aut... Using the Agilent 7890A. Column installed with no leaks detected. Both the front and back detector are set to 300°C, gas Flow Rates - Hydrogen: 45mL/min, Air 450mL/min and He 1.0mL/min. The split flow is 80mL/min... The following are the manual steps for performing the standard inlet tests for 6890 and 7890A GCs. Typically, one runs the Inlet Leak Check to confirm whether there's a leak (the leak rate you determine is only approx... Hello, I have just changed a FID weldment from "FID adaptable fitting" to "Capillary optimized fitting" on a Agilent 7890A GC. The FID jet dimensions mounted in the new FID weldment are quite new to me... Ther... Hello, my GC 6890 oven is not heating up. I already checked the flapper operation and it is working properly. My next guess would the oven heater or the oven sensor. Could it be something else? Maybe the oven heater f... Dear Community, hello ¿It's possible to clean my CG liner? This is the number part: 5183-464 (Inlet liner, split, single taper, glass wool, deactivated, low pressure drop) Thank you!