The method to detect residues effectively of three pyrethroids in Houttuynia cordata by gas chromatography was established for enhancing the edible safety of Houttuynia cordata.The samples were extracted with acetone,cleaned by Florisil column which was leached with 50 ml hexane-acetone(95∶5,V/V),and determined by Agilent 6890N GC-μECD.The results showed that the recovery rate was 77.0%~108.5% with the relative standard deviation(RSD) of 1.6%~12.6%.This method was simple with good separation and high sensit...