AUTOMATIC CONTINUOUS-FLOW DETERMINATION OF PARAQUAT AT THE SUBNANOGRAM PER MILLILITER LEVEL

被引：23

作者：

AGUDO, M ^{[1
]}

RIOS, A ^{[1
]}

VALCARCEL, M ^{[1
]}

机构：

[1] UNIV CORDOBA,FAC SCI,DEPT ANALYT CHEM,E-14004 CORDOBA,SPAIN

来源：

ANALYTICA CHIMICA ACTA | 1993年 / 281卷 / 01期

关键词：

FLOW SYSTEM; PARAQUAT; SOIL ADSORPTION; WATERS;

D O I：

10.1016/0003-2670(93)85344-J

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A flow-through spectrophotometric sensor for the determination of paraquat at the nanogram per milillitre level based on integration of preconcentration, reaction and detection in the flow-cell is proposed. The determination range achieved depends on the sample volume used. Thus, 250 ml of sample provides detection and determination limits of 0.11 and 0.44 ng ml-1 paraquat, respectively. The relative standard deviation was +/-7.9% for 1.0 ng ml-1 paraquat. The potential interference of other pesticides was studied, and the method was used to analyse water samples and study the adsorption of paraquat in different types of soils.

引用

页码：103 / 109

页数：7