DETERMINATION OF PARAQUAT BY FLOW-INJECTION SPECTROPHOTOMETRY

被引：33
|
作者：
JAIN, A [1 ]
VERMA, KK [1 ]
TOWNSHEND, A [1 ]
机构：
[1] UNIV HULL,SCH CHEM,KINGSTON HULL HU6 7RX,N HUMBERSIDE,ENGLAND
来源：
ANALYTICA CHIMICA ACTA | 1993年 / 284卷 / 02期
关键词：
FLOW SYSTEM; SPECTROPHOTOMETRY; PARAQUAT;
D O I：
10.1016/0003-2670(93)85311-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The solution obtained by oxidizing some of the ascorbic acid to dehydroascorbic acid by reaction with potassium iodate is used as a reagent for the reduction of paraquat to a blue radical cation in the flow-injection spectrophotometric determination of paraquat. A rectilinear calibration graph was obtained over the range 0.1-100 mu g ml(-1) paraquat, and the limit of detection was 20 ng ml(-1) paraquat (signal-to-noise ratio = 3). This reagent has been found superior to ascorbic acid alone or sodium dithionite because of the lower limit of detection, wide linear range of determination, rapid reaction and high stability.
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页码：275 / 279
页数：5
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