Carbon Tetrafluoride analysis

[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?

[70 eV]

TO-15 will get you down to 0.2 ppb easily in full scan.

[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,

[pacerlaser]

Using the PDHID and a packed column did the trick. Eluted around the 10 minute mark.

[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/