Author(s): S. DAS, A. KUNDU, A. BHATTACHARYYA, D. SINGHA, S. SAHA, A. BHATTACHARYYA AND S. ROY

Abstract: A simple, rapid and modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) method was developed for single stroke analysis of 86 multiclass pesticides in pineapple juice using Gas chromatography tandem mass spectrometry (GC-MS/MS). From the preliminary trial of three methods (viz. Method I, II and III) Method I, due to better mean recovery percentage of individual pesticides, was selected and validated based upon selectivity, sensitivity, linearity, precision, accuracy, Limit of Detection (LOD) and Limit of Quantification (LOQ) criteria. The correlation coefficient (r2) of all pesticides ranged between 0.97 - 0.99 and the average recovery values within 70 - 120 % with intra laboratory repeatability (RSDr) below 20 % and appreciable Horwitz ratio in between 0.5 to 2 at LOQ level; proved that this method is sufficiently accurate, repeatable and therefore can be effectively utilized for accurate profiling of pesticide residues in export samples.

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