Objective:To compare the levels of 5 pyrethroid pesticide residues in two types Chinese traditional medicines

i.e.Ganoderma and Poria.Methods:A sum of 20 batches of Ganoderma and Poria(10 batches each)samples were collected and identified.The 5 pyrethroid pesticide residues in samples were extracted by ultrasonic washing machine with organic solvent

cleaned up by solid-phase extraction to remove the interferences of co-extractives

and then were analyzed by gas chromatograph(GC)equipped with an electron capture detector

quantified by the external standard method.Results:The 5 pyrethroid pesticide residues were not detected in 10 batches samples of Poria

Among 10 batches samples of Ganoderma

the 5 pyrethroid pesticide residues were not detected in 9 batches samples

and fenvalerate was detected in 1 batch sample without exceeding the limit.Conclusion:The result suggested that most of the Ganoderma and Poria were not contaminated by the residues of 5 pyrethroid pesticides.