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Application to Routine Analysis of a Method to Determine Multiclass Pesticide Residues in Fresh Vegetables by Gas Chromatography/tandem Mass Spectrometry by J. L. Martínez Vidal; F. J. Arrebola; M. Mateu‐Sánchez is a Chemistry article available to read on EtoBox.

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## Abstract The use of gas chromatography/tandem mass spectrometry (GC/MS/MS) applied to determine multiple pesticide residues in fresh vegetables has been thoroughly studied. A single injection method to detect, confirm and quantify 54 multiclass pesticides has been developed and applied in a routine analysis laboratory. The proposed method consists of a rapid extraction of 15 g of vegetable sample with dichloromethane. An additional clean‐up step is not necessary even when injecting 10 μL of extract. Instead the gas chromatograph was fitted with a carbofrit inserted into the glass liner and a guard column. In addition, the detection mode chosen (MS/MS) provides additional selectivity. The method has been validated and applied to 1300 samples in a routine laboratory following specified quality criteria. The recovery efficiencies obtained for all the pesticides ranged between 70.2 and 110.8% at two different fortification levels. The relative standard deviation for quantification (RSD) was lower than 16.7% for all the compounds. Important experimental parameters, such as the conditioning of carbofrit, overload of the analytical column, and cleanliness of the ion trap, were evaluate

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Author

J. L. Martínez Vidal; F. J. Arrebola; M. Mateu‐Sánchez

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2002

Language

EN

Field

Chemistry (Physical Sciences)