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- Posts: 164
- Joined: Sun Oct 04, 2009 6:18 pm
I'm setting up a method for PAHs in air (TO-13) on a 7890A/5975C with a gerstel PTV inlet installed. I'm injecting 5uL of dichloromethane solutions into a baffled liner using the solvent vent mode, and my trouble is with one of our extraction surrogates, nitrobenzene-d5. I get very little response, if any. I've tried varying initial inlet temps from 30 down to -30, altering the vent time and flowrate to best vent the dichloromethane, but no appreciable difference in recovery. We're about to get rid of nitrobenzene-d5 altogether and substitute another surrogate that won't be problematic. I hope that I'm not missing something very important setting this method up. With a boiling point of approximately 210, I don't see why this compound should be such a problem.
Christian