油料作物和粮食作物种子中有机氯农药残留分析

Residue of Organochlorine Pesticides in Seeds of Oil and Crop Plants

为了调查作物种子中有机氯残留的现状和种子脂质含量与种子中有机氯残留的关系，本文通过GC-ECD对某农产品基地的油料作物花生、大豆、芝麻和粮食作物水稻、小麦、玉米种子中有机氯农药残留进行了分析。结果表明，对照WHO／FAO标准，6种作物种子中的滴滴涕（DDT）和六六六（HCH）残留均不超标；总DDT的残留范围是3．8～10.3ng／g，残留顺序是花生〉芝麻〉大豆〉玉米〉小麦〉水稻；总HCH的残留范围是4．3～10．7ng／g，残留顺序是花生〉玉米〉芝麻〉大豆〉小麦〉水稻。3种油料作物种子中的总DDT残留浓度显著高于3种粮食作物种子中的残留浓度，种子中的总DDT残留浓度与种子脂质含量的对数显著正相关。

Seed samples of three oil plants （peanut, soybean, sesame） and three crop plants （rice, wheat, maize） were collected from an agricultural product base, and residues of organochlorine pesticides in the samples were detected by GC-ECD. The results showed that the residues of organochlorine pesticides in the seeds were below the maximum residue limit （100 ng/g） set by WHO/FAO. The total DDTs ranges from 3.8 to 10.3 ng/g and was in a order as follows： peanut〉sesame〉soybean〉maize〉wheat〉rice. The total HCHs ranges from 4.3 to 10.7 ng/g and was in a order as follows： peanut〉maize〉 sesame 〉soybean 〉wheat 〉rice. The residues of total DDTs in three oil plants seeds were higher significantly than those in three crop plants seeds.