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I am trying to know about some unknown mass peak from my sample's TIC, but how to approach for it I don't know? Can someone suggest me some ways to do it?
To expand on Mitch's comment, the latest US EPA method 8270E (SW-846 Update VI 8270E - 32 Revision 6 June 2018 - SEMIVOLATILE ORGANIC COMPOUNDS BY GAS CHROMATOGRAPHY/MASS SPECTROMETRY) gives a good summary of what you can do for an "unknown" compound in a TIC. "11.6.2 Tentative Identification - For samples containing components not associated…
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We have an Agilent 7200B GC-QTOF, and recently added a cryogenic GCxGC modulator and therefore need to speed up the data acquisition rate. However, when collecting profile data in 50 Hz, the system hangs usually about 10 - 15 minutes into the run (not at the same time each run). The instrument collects 50 Hz centroid data without issues, and… Show more
(to Hi jonsun, How did you go fixing the problem? Was it a cable or switch or something else? Regards, Nick
I installed a column in my 6890/5975 inert GC-MS and when I did an autotune the tuning process stopped and there was an error message that the Entrance Lens was above the maximum of 64. The instrument had been used by another person for a two sequences. When that person ran an autotune on 3/13/19 the Ent Lens voltage was 19.07. On 3/15/19 the… Show more
I agree with m4esti, If the last thing that was changed was installing a new column, I would start with that as a possible root cause. Always check the last thing changed 1st. What happen to the system between 13th and 15th? Was that when the column was changed? If you know how, in the manual tune screen you could try performing a lens…
Hi, My method for 6890 GC/FID has a warning message that there are overlapping integrations for some of the compounds, I would like to correct this but unsure how, I know the answer lies in the integration events table. Any help is appreciated!
Hi megaflorch, Without knowing what software you are using, this in general, is in the integration setup where it specifies +/- 0.5 minutes for the RT window. You can make this less time and it may go away. For some close eluting peaks you may have trouble suppressing this warning. Regards James
I have attached a copy of the method I am currently using. Please review it and let me know if you can assist me. Thank you!
Thanks again for the suggestions Brandon. I will put them into practice and let you know about progress.
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eixeirad, jan, aline.castilla-vitkovsky, a.fedulova, and yubelykh updated avatars:
Hi I'm having an important issue with Openlab CDS 2.4 File based Workstation. Installing v2.3 goes without any error, and I can completely connect and control a GC 6890N. When updating to 2.4, I get a Install error on the GC/MS line Running the Software Verification tool give me no error. Every thing says "OK" (logs will be… Show more
We are aware of a problem with the 6850 and 6890 drivers in OpenLab 2.4 in regions where the decimal separator is the comma (",") rather than the period (".") that is used in the U.S. This problem will certainly be fixed in a future release. In the meantime, the workaround is GC Driver B.01.04 HF1, as stated by majkee. The driver has been…
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