US EPA

1622005 

Journal Article 

Gas chromatography of carbamate derivatives. I. Simple carbamates 

Zielinski, WL, Jr; Fishbein, L 

1965 

Yes 

Journal of Chromatographic Science
ISSN: 0021-9665 

3 

4 

142-144 

English 

10.1093/chromsci/3.4.142 

Simple nitrogen unsubstituted carbamate derivatives and their structural relation to elution on polar and nonpolar substrates were analyzed. Separations were performed for the carbamates on polar and nonpolar coatings. Prepacked columns and one specifically prepared column were used. Compounds were analyzed by gas chromatography, and included: methyl-carbamate (598550), urethane (51796), alkyl-carbamate (2114116), isopropyl-carbamate (1746776), n-propyl-carbamate (627123), methallyl-carbamate (19364217), sec-butyl-carbamate (2114150), isobutyl-carbamate (543282), n-butyl-carbamate (592358), beta-chloroethyl-carbamate (2114183), isopentyl-carbamate (543862), amyl-carbamate (638426), phenyl-carbamate (622468), hexyl-carbamate (2114207), and benzyl-carbamate (621841). Elution was in order of increasing chain length for n-alkyl derivatives. Chain branching diminished elution of derivatives containing the same number of carbon atoms in the alkyl chain from all three columns. All elution pairs on the Carbowax 20M polar column were discretely resolvable on the Versamid 900 polar column, and the converse for elution pairs on the Versamid column was also apparent. Carbamates were analyzed on the nonpolar SE-30 column at lower temperatures, which did not detract from the value of the data, and also minimized possible thermal decomposition or hydrolysis.