Multiresidue screening method for fresh fruits and vegetables with gas chromatographic/mass spectrometric detection
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- PMID: 1874703
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Multiresidue screening method for fresh fruits and vegetables with gas chromatographic/mass spectrometric detection
J Assoc Off Anal Chem.
1991 May-Jun.
Abstract
A gas chromatographic/mass spectrometric (GC/MS) screening method has been developed for the determination of pesticide residues in a variety of crop samples. Samples are extracted with acetonitrile and partitioned with sodium chloride saturated aqueous solution. Targeted pesticide analytes are separated on a short, narrow bore capillary column, identified by electron ionization MS scanned from 100 to 400 amu, and quantitated by the monitoring of base ions and internal standards. The accuracy of the quantitative determination measured in terms of average percentage recovery of 143 compounds in 13 crop samples was 92% with a relative standard deviation of 22%.
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