Studies on Removal of Residual Pesticides from Vegetables (II)

Removal of Residual Pesticides from Shantung greens and Other Vegetables by Washing

Abstract

Removal efficiency of pesticide residues by washings was studied by the evaluation test based on the removal ratio of residues through washing and three rinsing steps. Shantung greens sprayed with lead arsenate, sumithion and elsan, cucumber sprayed with sumithion, tomato sprayed with malathion, cabbage sprayed with DDVP were washed by some washing procedures suchas dipping, shaking, brushing or rubbing with and without detergent. Lead and arsenic were removed more efficiently and more completely by detergent washing. As to organic pesticides, the effect of detergent washing was found to be more significant and additional removal ratio was obtained by washing with the vigorous mechanical process such as brushing or rubbing.