Page 1 of 1
Carbon Tetrafluoride analysis
Posted: Thu Apr 03, 2025 5:37 pm
by pacerlaser
I am trying to set up a GC analysis of carbon tetrafluoride (tetrafluoromethane) but so far the FID (no surprise), ECD and GCMS have very small peak areas for this compound. The last detector at my disposal is a PDHID. Has anybody else tried analyzing for this compound?
Re: Carbon Tetrafluoride analysis
Posted: Thu Apr 03, 2025 6:59 pm
by 70 eV
TO-15 will get you down to 0.2 ppb easily in full scan.
Re: Carbon Tetrafluoride analysis
Posted: Fri Apr 04, 2025 2:31 am
by AICMM
Pacerlaser,
Yes, a PDHID should work. 14.7 eV ionization potential means argon mode wont work but helium mode should give you low ppm sensitivity depending on loop volume and split ratio if you have one. Should come off column very quickly I should think.
Best regards,
Re: Carbon Tetrafluoride analysis
Posted: Mon Apr 07, 2025 11:31 pm
by pacerlaser
Using the PDHID and a packed column did the trick. Eluted around the 10 minute mark.
Re: Carbon Tetrafluoride analysis
Posted: Thu Apr 24, 2025 12:56 am
by wss-1688
Hello, using a helium ion detector (PDHID) gas chromatograph is possible to analyze impurities in high-purity (5N) and above carbon tetrafluoride (CF4): O2 Ar, N2, CO, CO2, CH4 with a detection limit of 5ppb, NF3 with a detection limit of 100ppb. Welcome to our website
http://www.lansis17.com/