Spectrofluorimetric determination of paraquat by manual and flow injection methods

被引：14
|
作者：
Pérez-Ruíz, T [1 ]
Martínez-Lozano, C [1 ]
Tomás, V [1 ]
Fenoll, J [1 ]
机构：
[1] Univ Murcia, Fac Chem, Dept Analyt Chem, E-30071 Murcia, Spain
来源：
ANALYST | 1998年 / 123卷 / 07期
关键词：
paraquat; benzaldehyde; fluorimetric method; flow injection;
D O I：
10.1039/a801901k
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The reaction involving the formation of a fluorescent charge-transfer complex between paraquat and benzaldehyde was studied in ethanol-water medium. In the presence of a large excess of.benzaldehyde, the fluorescence intensity is linearly related to paraquat concentration from 0.13 to 7.4 mu g ml(-1). The method can be easily adapted to a flow system using a two-channel manifold, the peak height being proportional to the paraquat concentration over the range 1.6-22.3 mu g ml(-1) Manual and flow-injection procedures were satisfactorily applied to the determination of paraquat in commercial herbicides, waters, soils and potatoes.
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页码：1577 / 1581
页数：5
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