Abstract

UNCERTANITY OF MEASUREMENT DURING ESTIMATION OF 28 PESTICIDES RESIDUE PRESENT IN BOTTLE GOURD

Sudeep Mishra, Neelam Richhariya*, Rachana Rani, Lalitesh K. Thakur, Vikash, Vineet Kumar Pandey and Shubham Bansal

Abstract

The study was conducted for the calculation of uncertainty in bottle gourd 28 pesticides were taken for study. All the pesticides gave good response to Gas chromatography electron capture detector. For calculation of uncertainty of method, major sources like weighing of standard, purity of certified reference material, precision study i.e repeatability and standard solution preparation were considered. The steps for calculation of uncertainty is identification of uncertainty sources, quantification of uncertainty sources and calculation of combined uncertainty. Combined standard uncertanity of standard preparation due to volumetric flask and micropipette is 0.00092 and calculation due to purity of certified reference material lies between 0.00289-0.0030 and uncertainty due to precision lies between 0.0006 to 0.0025. From all the individual uncertainty calculated are combined, later converted to expanded uncertainty. Percent uncertainty lies between 14 to17 percent which is with in permissible as per EURACHEM/CITAC 2000.

Keywords: Chilli, Uncertanity, Combined Uncertanity, Expanded Uncertanity, Pesticide