Detemination of fungicide residues in grape by GC/MS.

Abstract

The extensive use of pesticides in modern farming on fruit and vegetables has posed risks to public health and environment. Pesticide residues can be found even when they are applied in accordance with good agricultural practices. This paper deals with the analysis residues of three fungicides (benalaxyl, dimethomorph, tetraconazole) by chromatographic method in grape samples. The applicability of the proposed method to detect and quantify pesticide residues has been demonstrated by the analysis sample grapes varieties "Zilavka" and "Blatina" cultivated on a small farm in the vineyards in a broader the region of Mostar. Analytes were extracted using SPE technique and analysis is performed by gas chromatography, employing mass selective detection in the selected ion monitoring mode, The content fungicides (benalaxyl, dimethomorph, tetraconazole) in grape samples is regulated by relevant EU regulation (The Annexes of Commission Regulation (EC), No. 396/2005). In grape samples analyzed in this study residues of benalaxyl and tetraconazole were found. The fungicide concentrations were bellow the MRL value permitted by EU regulations for grape.