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
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
收藏
页码:1891 / 1904
页数:14
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