Sensitive determination of diquat by a kinetic method using the stopped-flow mixing technique.
Analyst
; 125(12): 2372-5, 2000 Dec.
Article
em En
| MEDLINE
| ID: mdl-11219084
ABSTRACT
A simple, sensitive, selective, fast and inexpensive assay for the determination of diquat is proposed. The method is based on the reduction of the herbicide to a strongly fluorescent monocation radical with sodium dithionite. The initial rate of this reaction is directly proportional to the diquat concentration. The stopped-flow mixing technique was used because the kinetic data can be obtained in only 7 s, meaning that the method can be automated. The calibration graph is linear over the range 5-500 ng ml-1 and the precision (RSD) is close to 1.2%. The applicability of the method was demonstrated by determining the herbicide in different kinds of samples.
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Coleções:
01-internacional
Contexto em Saúde:
2_ODS3
Base de dados:
MEDLINE
Assunto principal:
Diquat
/
Poluentes Ambientais
/
Herbicidas
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Analyst
Ano de publicação:
2000
Tipo de documento:
Article