Study on Reduction Factors of Residual Pesticides in Processing of Ginseng(I)

Abstract

The aim of this study was to establish the maximum residue limits(MRLs) of fenhexamid, azoxystrobin and cyprodinil pesticides in ginseng products. The pesticides were applied to the cultivation field of ginseng, and they were harvested and processed to make dried ginseng and ginseng extract. The reduction factors of residual pesticides were calculated by determination of the pesticides in each processing stage of ginseng. Reduction factor (dry basis) of pesticides (azoxystrobin, fenhexamid, cyprodinil) were 0.73, 0.96 and 0.24 for dried ginseng and 3.23, 5.74 and 1.20 for ginseng extract. All the residual pesticides were reduced by drying or processing of ginseng, however, fenhexamid did not.