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Selective Extraction of Pyrethroid Pesticide Residues from Milk by Solid-matrix Dispersion by Alfonso Di Muccio; Patrizia Pelosi; Danilo Attard Barbini; Tiziana Generali; Antonella Ausili; Fabio Vergori is a Chemistry article available to read on EtoBox.

What is Selective Extraction of Pyrethroid Pesticide Residues from Milk by Solid-matrix Dispersion about?

A rapid procedure has been developed that allows a single-step, selective extraction and clean-up of pyrethroid (PYR) pesticide residues from milk dispersed on solid-matrix diatomaceous material filled into disposable cartridges and eluted by means of light petroleum saturated with acetonitrile and ethanol. The extract was cleaned up by high-performance size-exclusion chromatography. Determinations were carried out by gas chromatography with electron-capture detection. Recovery experiments were carried out on homogenized commercial milk (3.6% fat content) that was spiked with solutions of 14 PYR pesticides, viz., tefluthrin, tetramethrin, cyphenothrin, cyfluthrin, flucythrinate, fiuvalinate, deltamethrin, bioallethrin, fenpropathrin, h-cyhalothrin, permethrin, c~-cypermethrin, esfenvalerate and tralomethrin, at levels ranging from 0.04 to 0.41 mg/kg for the different PYR pesticides. Average recoveries were in the range 60-119% for the different PYR pesticides, with relative standard deviations from ca. 2.5 to 14.4%. Coextracted fatty material amounted to an average of ca. 5 mg/ml of milk. The sole extraction step requires about 30 min. The main advantages of the procedure are that

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Author

Alfonso Di Muccio; Patrizia Pelosi; Danilo Attard Barbini; Tiziana Generali; Antonella Ausili; Fabio Vergori

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

1997

Language

EN

Field

Chemistry (Physical Sciences)