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.
引用
收藏
页码：275 / 279
页数：5
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