Determination of Organochlorine and Pyrethroids Pesticide Residues in Forsythiae Fructus from Shanxi Province by GC

OBJECTIVE To establish a method for the determination of organochlorine and pyrethroids pesticide residues in Forsythiae Fructus. METHODS The samples with petroleum ether (60-90 ℃)-acetone (4∶1) mixture were extracted by ultrasonic wave and the extracted solution was cleaned by Florisil-alumina column. Nine kinds of organochlorine and three kinds of pyrethroids pesticides were directly analyzed by GC-ECD. RESULTS For all of the analyzed pesticides, the correlative coefficient of the calibration curves were in the range of 0. 999 2-0. 999 9 and the recovery rates were in the range of 80.69%-115.6%. Pesticide resiolues in seventeen samples(including eleven wild samples and six cultivated samples) were not found, and γ-BCH and cypermethrin residues was detected in three culture samples. CONCLUSION The new method is convenient, rapid, accurate and can be applied to determine pesticides in Fructus Forsythiae. Shanxi wild Forsythiae Fructus growth environment is good, and has not been contaminated by organochlorine and pyrethroid pesticide.