Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume
40, Number 6, July 2002, pp. 321-325
Fast Gas Chromatography Analysis of N-Carbamates with Cold On-Column
Injection
Xiling
Song and Harold M. McNair Department of Chemistry, Virginia Tech, Blacksburg,
VA 24061
Direct gas chromatographic (GC) analysis of thermally labile
N-carbamates is studied by using fast GC with cold on-column injection. With
the greatly reduced injection temperature, short column lengths, high flow rate,
and fast temperature-programming rate, the exposure of carbamates to high temperature
is reduced and degradation can be avoided. Nine N-carbamates in EPA Method 531
are eluted without thermal decomposition. The relative standard deviation percentage
for peak areas average 1.9% for all of the carbamates analyzed. A conventional
GC instrument is employed to simplify the experiments. GC–mass spectrometry
is used to monitor the decomposition peaks.
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