Gas-chromatographic determination of deltamethrin in crops |
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Authors: | Sandro Navickiene Marta H Kato Luciana Polese E V Minelli Maria L Ribeiro |
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Institution: | (1) Departamento de Química Organica, Instituto de Química, UNESP C.P. 355, 14800–900, Araraquara, SP, Brazil, BR |
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Abstract: | A rapid and economical method is described for the determination of deltamethrin in wheat, rice, peanuts and corn. It is
based on simultaneous extraction and clean-up on a column packed with alumina and silica gel using n-hexane-ethyl ether (8:2,
v/v), followed by a derivatization step and gas-chromatographic analysis. Recoveries from fortified cereal and peanut samples
were determined at four concentration levels and ranged from 73 to 109%. The detection limits were 0.01 to 0.03 mg/ kg. This
method simplifies the traditional procedures in terms of sample size, solvent consumption and analysis time.
Received: 25 March 1997 / Revised: 3 June 1997 / Accepted: 4 June 1997 |
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