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Ultra-performance Liquid Chromatography for the Determination of Pesticide Residues in Foods by Tandem Quadrupole Mass Spectrometry With Polarity Switching

Ultra-performance Liquid Chromatography for the Determination of Pesticide Residues in Foods by Tandem Quadrupole Mass Spectrometry With Polarity Switching

Cristiana C Leandro, Peter Hancock, Richard J Fussell, Brendan J Keely

J Chromatogr A. 2007 Mar 16;1144(2):161-9.

PMID: 17303144

Abstract:

An ultra-performance liquid chromatographic (UPLC) electrospray ionisation tandem quadrupole mass spectrometric method has been developed for the determination of 52 pesticides in cereal-based baby foods, oranges and potatoes. The fast polarity switching capability of the mass spectrometer used enabled the determination of 44 of the compounds in the positive ionisation mode and 8 of the compounds in the negative ionisation mode in a single run. Prior to analysis, co-extractives were removed from acetonitrile extracts using dispersive solid-phase extraction with primary secondary amine (50 mg). The UPLC method separates all of the pesticides, resolves structural isomers (e.g. butocarboxim sulfoxide and aldicarb sulfoxide) and has a short (7 min) cycle time. Extracts spiked with pesticides at 0.10 and 0.01 mg kg(-1) yielded average recoveries in the range of 66-124% with relative standard deviations less than 19% for the majority of the analytes.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP34681248	Butocarboximsulfoxide		34681-24-8	Price

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