A SEQUENTIAL SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF PARAQUAT AND DIQUAT IN PLASMA

被引：13

作者：

SELLERO, IS

LOPEZRIVADULLA, M

CRUZ, A

BERMEJO, A

FERNANDEZ, P

机构：

[1] Departamento de Medicina Legal, Facultad de Medicina, Universidad de Santiago, E-15706 Santiago de Compostela, La Coruña

来源：

ANALYTICAL LETTERS | 1993年 / 26卷 / 09期

关键词：

PARAQUAT; DIQUAT; SEQUENTIAL DETERMINATION; 2ND-DERIVATIVE SPECTROPHOTOMETRY; PLASMA;

D O I：

10.1080/00032719308017438

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A sequential spectrophotometric method for the simultaneous determination of paraquat and diquat in plasma using second-derivative spectroscopy after ion-pair liquid-liquid extraction was developed. The paraquat and diquat in the last extract are reduced with alkaline sodium dithionite to coloured complexes whose absorption peaks appear at a different wavelength. The two herbicides can thus be determined sequentially over the wavelength ranges 454.3-446.4 nm (diquat) and 460-396 nm (paraquat), respectively.

引用

页码：1891 / 1904

页数：14

共 29 条

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