אסיף מאגר המחקר החקלאי

Determination of residues of benomyl, its hydrolysis product, and thiabendazole in various crops

Year:

1973

Source of publication :

Authors :

Volume :

56

Co-Authors:

Aharonson, N., Pesticide Chem. Residue Res. Lab., Volcani Cent., Bet Dagan, Israel
Ben Aziz, A., Pesticide Chem. Residue Res. Lab., Volcani Cent., Bet Dagan, Israel

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Abstract:

An analytical procedure is described for residue determination of benomyl, its hydrolysis product, 2 benzimidazole carbamic acid methyl ester (MBC), and thiabendazole (TBZ) in various plants. The method involves acetone extraction, partitioning between acetone water and ethyl acetate, and cleanup on a magnesium oxide Celite alumina column. Benomyl is quantitatively converted on the chromatographic column to MBC, whereas TBZ is unchanged. The compounds are quantitatively measured by direct fluorometric measurement of either MBC or TBZ. The method is sensitive to 0.1 ppm benomyl and 0.02 ppm TBZ. The results from check samples have shown very good reproducibility and accuracy.

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