Analysis of Pesticides in Food - Identification and Quantitation of Oxychlordane in the
The trace analysis of pesticides in foods is commonly performed by gas chromatography with mass spectrometric detection. Typically, a general analytical method that can monitor a broad range of the potential pesticides in the sample is used, and the method is designed to provide a definitive measurement of the concentration of the various potential pesticides based on the intensity of a major fragment ion in the spectrum. This approach assumes that the presence and intensity of the fragment ion is due solely to the compound of interest.
Due to the complexity of the sample and the range of pesticides that are commonly used, it is very possible that an unknown or unexpected compound can co-elute with a target compound and interfere with the quantitative determination of that target. Peak deconvolution is a powerful tool to assist the analyst in determining the signal from the target compound in cases where co-elution of an interferent is observed. Once the signal from the target compound is isolated, reliable quantitative measurements can be readily obtained.