Estimation of uncertainty of sample preparation for the analysis of pesticide residues
Abstract The sampling constant and testing method proposed by Ingamells and Switzer, and Wallace and Kratochvil were used for estimating the uncertainty of sample preparation of apples and head‐cabbages. The sampling constants of about 1.6 kg and 10–20 kg were determined for cabbage and apple, respectively. Consequently about 64 g cabbage and 440–880 g apples should be extracted for holding the uncertainty of sample preparation