Estimating the uncertainty of pesticide residue analysis from mango using multi-residue analysis and validation of method.
Pooja Suman, Singh D. K.
Author Affiliation: Department of Zoology, University of Delhi, Delhi - 110 007, India.
Toxicological and Environmental Chemistry 93 : 1880-1896
Abstract : Validation of method was performed for various pesticides on mango matrix involving the processing of sample at ambient and cryogenic conditions. The linearity, limits of detection, repeatability, matrix effect, and recovery were studied as the aspects of method validation. The effect of matrix on recovery was found to be medium (20-50%) and strong (>50%). After correction by matrix-matched calibration curves, the recovery was calculated to be in the range of 80-107% and 80-105% at ambient and cryogenic processing, respectively. The precision estimated for the recovery of pesticides obtained from both solvent- and matrix-matched calibration curves and at both the processing conditions was determined to be >20% except for chlorpyrifos and atrazine. The uncertainty established for the methodology was >20%, which substantiates the efficiency and reliability of methodology used for pesticide residue analysis in mango in this study.