Gas Chromatographic Method for Determination of 15 kinds Organochlorine Pesticides Residues in Soil

Soil background value of 15 kinds organochlorine pesticides residues in 150 sites of Guizhou province were determined simultaneously by gas chromatographic method.Organochlorine pesticides residues were extracted with V(A):V(B)=3:1(A:petroleum ether,B:acetone) and purified with Sodium sulphate solutions and florisil. The precision of peak area and retention time were 1.14～5.15 and 0.01～0.09 respectively;all the linear relation were over 0.99 and the rate of recovery was 84.3%～127.8%,Detection limits were 0.003～0.025ng/g.This method can be adopted for determination of soil background value of organochlorine pesticides residues.