GAS-CHROMATOGRAPHIC METHOD FOR DISCRIMINATING BETWEEN CHLORINATED PESTICIDES AND POLYCHLOROBIPHENYLS IN MIXTURES

被引：3

作者：

VIDAL, LH ^{[1
]}

TREVELIN, WR ^{[1
]}

LANDGRAF, MD ^{[1
]}

REZENDE, MOO ^{[1
]}

机构：

[1] UNIV SAO PAULO,INST FIS & QUIM SAO CARLOS,DEPT QUIM & FIS MOLEC,CX P 369,BR-13560 SAO CARLOS,SP,BRAZIL

来源：

ANALYTICA CHIMICA ACTA | 1992年 / 269卷 / 02期

关键词：

GAS CHROMATOGRAPHY; ORGANOCHLORINE PESTICIDES; PESTICIDES; POLYCHLOROBIPHENYLS; SEDIMENTS;

D O I：

10.1016/0003-2670(92)85404-T

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A gas chromatographic method for differentiating between chlorinated pesticides and polychlorobiphenyls (PCBs) in mixtures, based on the effects of temperature on the areas (A) of the peaks obtained with an electron-capture detector, is described. It is shown that plots of peak area vs. temperature for chlorinated pesticides have broad peaks with maxima near 550 K whereas similar plots for PCBs tend to increase continuously with increasing temperature. It is also observed that plots of In AT 3/2 vs. 1/T are linear with slopes near zero or positive for chlorinated pesticides and negative and large for PCBs. This behaviour is combined with relative retention indices to differentiate between chlorinated pesticides and PCBs in river sediments.

引用

页码：205 / 210

页数：6

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