DETERMINATION OF ADDITIVES IN POLYPROPYLENE BY SELECTIVE CHEMICAL IONIZATION MASS-SPECTROMETRY

被引:16
作者
RUDEWICZ, P [1 ]
MUNSON, B [1 ]
机构
[1] UNIV DELAWARE,DEPT CHEM,NEWARK,DE 19716
关键词
HYDROCARBONS - Spectroscopic Analysis - POLYMERS - Additives - SPECTROSCOPY - Applications;
D O I
10.1021/ac00293a021
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A method for the determination of additives in polypropylene without prior separation is described. The additives are vaporized from polypropylene samples in a heatable glass probe under chemical ionization (CI) conditions using a 1. 1% NH//3 in CH//4 reagent gas mixture. The dominant ion in this mixture, NH//4** plus , is a low-energy reagent ion that reacts with the additives to give very simple spectra of (M plus H)** plus or (M plus NH//4)** plus ions and little fragmentation. The selectivity of the ammonium ion for the detection of additives in a hydrocarbon matrix is demonstrated.
引用
收藏
页码:358 / 361
页数:4
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