Abstract:

The aim was to develop a method for determining multi-residues of permethrin, bifenthrin, baythrioid, fenvalerate, deltamethrin, fenpropathrin, lambda-cyhalothrin in Ginseng samples by using Gas Chromatography (GC). Sample was extracted by acetonitrile, cleaned up with a CARB/NH2 column, followed by separation on a DB-1701 capillary column, and then detected by GC-μECD. A mixed standard solution prepared from primary standards of the 7 pesticides, and calibration curve for each of the 7 pesticides was prepared covering the concentration ranges of 0.05 to 1 mg/kg. The correlation coefficients of these calibration curves were 0.9993, 0.9995, 0.9992, 0.9996, 0.9988, 0.9993 and 0.9993, respectively. The recoveries of 3 standard addition levels of high, medium, low concentrations were 79.1%-103.3%, with relative standard deviations from 3.6 to 9.7, the detection limits were from 0.0008 to 0.03 mg/kg for pyrethroid pesticides. The method was simple, fast, accurate and suitable for detecting the residues of pyrethroid pesticides in ginseng.