Analysing organophosphorus pesticides in wines using graphitized carbon black extraction cartridges.
Food Addit Contam
; 16(2): 57-61, 1999 Feb.
Article
em En
| MEDLINE
| ID: mdl-10435073
A quick and simple method was developed to determine the residues of 15 organophosphorus pesticides of different polarity in grape wine, based on liquid-solid extraction with graphitized carbon black cartridges and capillary gas chromatography. Aliquots of diluted wine (10 ml wine + 40 ml deionized water) and 250 mg graphitized carbon black cartridges were used to extract the analytes. The pesticides were eluted with 2 x 0.5 ml acetone and 3 x 2.5 ml ethyl acetate/acetone (80:20). The eluates were then dried with anhydrous sodium sulphate and concentrated to 1 ml under a nitrogen current. After adding triphenylphosphate internal standard (i.s.), this extract was analysed by capillary gas chromatography using a nitrogen-phosphorus detector (GC-NPD). Pesticide recovery percentages at levels of 0.01 and 0.02 microgram/ml were between 74% and 111%, with a 2-13% relative standard deviation interval. The chromatograms of extracts had few co-extracted species peaks, with no analytical interference. Dilution of the grape wine samples removed most of the pigments, thus producing clear extracts. The results indicate that liquid-solid extraction from wine samples using graphitized carbon is fast (25 min per sample), efficient and reproducible for analysing organophosphorus pesticides of different polarity.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Organofosforados
/
Vinho
/
Resíduos de Praguicidas
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Contaminação de Alimentos
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Inseticidas
Limite:
Humans
Idioma:
En
Revista:
Food Addit Contam
Assunto da revista:
CIENCIAS DA NUTRICAO
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Venezuela
País de publicação:
Reino Unido