关键词: 柳州市, 柳州市

Abstract: The residue characteristics of organochlorine pesticides (OCPS) were studied under the soil of rice. In the study, hexachlorocyclohexane (HCHS) and dichlorodiphenyl trichloroethane (DDTS) were analyzed using gas chromatography equipped with ECD detector. The results showed that HCHS and DDTS were found widely in all samples and with a range of 0.41-9.61μg/kg and 6.51-469.50 μg/kg respectively. The content of HCHS was much lower than the soil environmental quality standard (GB 15618-1995), and it limits the quantity being worth 50 μg/kg, but 76.9% of samples had a total DDTS residue of less than 50 μg/kg. And the DDTS, which was the main components in residues of organochlorine pesticides, took over 96.2% of the total. The residual characteristics of HCHS isomers in the soil was β-HCH>γ-HCH>α-HCH>δ-HCH, β-HCH concentration was higher than other HCHS isomers. The residual characteristics of DDTS isomers in the soil was pp'-DDT>op'-DDT>pp'-DDE>pp'-DDD, and the pp'-DDT was the main components in residues of DDTS, pp′-DDT/(DDD＋DDE) value in soil was greater than one, this suggested that the new DDTS were input in the soil of rice.