By Anonymous on Thursday, March 2, 2000 - 02:42 am:
I am doing quantitative analysis ( internal standard method) of amines by GCMS.I face a unique problem.I get good reproducibility for the first few injections and afterwards all the results show absurd values even if I inject same solution throughout the day.I use HP-1MS column and quantitation is in fullscan mode. The capacity of TMP is 50 l/s.
Give me some possible solutions.
By lisa on Thursday, March 2, 2000 - 06:07 am:
If you're not quanting tertiary amines, you might want to try derivatizing them. Also, make sure your inlet liner is deactivated. If your results are absurdly high, you might be having a good deal of carryover from the inlet--inject an extracted blank after a high standard and see if it's carrying over.
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