The Systematic Separation and Identification of Pesticides in the First Division

The systematic identification and determination of many kinds of pesticides were tried by a combination of column, thin-layer and gas chromatography. Pesticides in the first division,¹⁾ e.g., aldrin, DMC ethylene, CPAS, DDDS, o,p′-DDT, p,p′-DDT, heptachlor, quintozene, Telodrin and tetrasul, were separated from pesticides in the second division,¹⁾ e.g., α-BHC, β-BHC, γ-BHC, trifluralin, CPA, CNP, nitrofen, endrin, dieldrin, dicofol, etc. by column chromatography. Further, pesticides in the first division were separated from each other and determined approximately by thin-layer and gas chromatography.

The recoveries of these pesticides, except for aldrin and CPAS, were about 100%. The recoveries of aldrin and CPAS were about 70 %, due to decomposition during the procedures, or to adsorption on the adsorbent during the column chromatography. It was presumed from GC-MS data that CPAS was decomposed to DDDS, tetrasul and other compounds during the procedures.