CHARACTERIZATION OF BROMINATED AND BROMO CHLORO DIBENZO-(P)UNDER-BAR-DIOXINS AND DIBENZOFURANS BY GAS-CHROMATOGRAPHY MATRIX ISOLATION-INFRARED SPECTROMETRY

被引:7
作者
CHILDERS, JW [1 ]
WILSON, NK [1 ]
HARLESS, RL [1 ]
BARBOUR, RK [1 ]
机构
[1] US EPA,ATMOSPHER RES & EXPOSURE ASSESSMENT LAB,RES TRIANGLE PK,NC 27711
关键词
D O I
10.1016/0045-6535(92)90143-F
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Reference matrix isolation-infrared (MI-IR) spectra of selected tetrabrominated dibenzo-p-dioxins (DDs), tetrabrominated dibenzofurans (DFs), and mixed bromo/chloro DDs and DFs were recorded and compared to MI-IR spectra of the corresponding fully chlorinated DDs and DFs. The MI-IR absorption bands for the fully brominated and mixed bromo/chloro DDs and DFs exhibit changes in relative intensity and in some cases shift to lower frequencies compared to their fully chlorinated analogs. The capabilities of MI-IR spectrometry for discriminating between positional isomers, which are often difficult to separate chromatographically and to distinguish by high-resolution gas chromatography/high-resolution mass spectrometry (HRGC/HRMS), are also demonstrated.
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页码:1285 / 1290
页数:6
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