GAS-CHROMATOGRAPHIC DETERMINATION OF VOLATILE ALKENES WITH ON-COLUMN BROMINATION AND ELECTRON-CAPTURE DETECTION

被引：6

作者：

CAO, XL ^{[1
]}

HEWITT, CN ^{[1
]}

机构：

[1] UNIV LANCASTER,INST ENVIRONM & BIOL SCI,LANCASTER LA1 4YQ,ENGLAND

来源：

JOURNAL OF CHROMATOGRAPHY A | 1995年 / 690卷 / 02期

基金：

英国自然环境研究理事会;

关键词：

D O I：

10.1016/0021-9673(94)00855-4

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A method is described for the gas chromatographic-electron-capture detection determination of alkenes via on-column bromination reactions. Pyridinium bromide perbromide (PBPB) was used as the Br-2 source, and a cholesterol-glass beads mixture, treated with methanol, was used to remove excess Br-2. The optimum ratio of cholesterol to glass beads was found to be 1:10, at which 93% of the bromine released from PBPB can be removed, without removal of the derivitized analytes. The conversion efficiency of alkene to the brominated derivative is extremely low (less than 2%) for ethene, whereas for propene and l-butene it is 41 and 79%, respectively. For C-3-C-5 alkenes, this method is 200-300 times more sensitive than analysis of the underivitized analytes by using conventional flame ionization detection.

引用

页码：187 / 195

页数：9

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