Determination of metribuzin and major conversion products in soils by microwave-assisted water extraction followed by liquid chromatographic analysis of extracts.
J Chromatogr A
; 962(1-2): 9-20, 2002 Jul 12.
Article
em En
| MEDLINE
| ID: mdl-12198975
ABSTRACT
A multiresidue method developed for the analysis of metribuzin and its major conversion products, deaminometribuzin (DA), diketometribuzin (DK) and deaminodiketometribuzin (DADK), in soils is presented. The method is based on microwave-assisted water extraction (MAWE) of soils using 10 mM phosphate buffer, pH 7 as extractant and analysis of aqueous extracts by HPLC-diode array detection. MAWE operational parameters were optimized with respect to extraction efficiency of the target compounds from soils with 1.5 and 3.5% organic matter content. Recoveries of all solutes above 80% were obtained from soils with 1.5% organic matter content; respective LOD and LOQ levels were determined at 5 and 10 micrograms/kg. In soils with organic matter content 3.5%, recoveries of all solutes were lower (< 70%) and the respective LOD and LOQ values were determined at 10 and 50 micrograms/kg. However, recoveries of fresh and aged residues, the latter weathered under cold storage conditions, were not statistically different for both types of soils.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes do Solo
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Triazinas
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Cromatografia Líquida de Alta Pressão
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Herbicidas
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
J Chromatogr A
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Grécia