Temperature-programmed gas chromatographic—mass spectrometric resolution of C 2C 5 alkyl halogenoacetates and halogenoethyl esters of C 2C 5 carboxylic acids with the same molecular weight on SE-54 and SP-1000 glass capillary columns

Abstract

The possibilities for reliable identification based on the electron impact and methane chemical ionization mass spectra of C 2C 5 alkyl monochloro-, monobromo- and trichloroacetates and isomeric 2-chloro-, 2-bromo- and 2,2,2-trichloroethyl esters of C 2C 5 carboxylic acids in poorly resolved chromatographic peaks of these chemical isomers were investigated. Temperature-programmed gas chromatography—mass spectrometry on non-polar SE-54 and polar SP-1000 glass capillary columns has been used to study the chromatographic separation and the retention order of pairs of halogenoacetates and halogenoethyl esters.