2000年中国总膳食样品中六六六和滴滴涕污染的溯源性分析

通过对 2 0 0 0年总膳食样品中有机氯农药残留分析 ,发现南方二区和北方一区水产类样品六六六高残留。由两个地区分省的聚类样品溯源分析 ,结果发现湖北省鳊鱼六六六含量为 4 0 0 6 0 μg kg ,为南方二区水产类六六六含量的 88 8% ,黑龙江省鲤鱼六六六含量为 6 30 96 μg kg,为北方一区水产类六六六含量的90 3% ,这是造成两个地区水产类六六六高残留的主要原因。由六六六异构体构成比例及GC MS的确证分析提示 ,两个地区的水产类样品受到林丹的污染。本研究表明我国某些地区存在违规使用林丹的现象。为保证我国居民膳食安全性 ,加强六六六和滴滴涕残留监测仍是我国食品安全领域的长期任务

Contamination source identification study of organochlorines pesticides in 2000 Chinese total diet study

The third Chinese total diet study to estimate dietary intake of contaminants was carried out in 2000. The levels of HCH and DDT residues were less significant in most of foodstuffs, but the level of HCH residues of aquatic foods in South 2 and in North 1 is respectively 75.99microg/kg and 170.72microg/kg, and the ratio of gamma-HCH is 90% of the total HCHs residues. To identify the contamination source of gamma-HCH, the individual province composite samples and the individual samples of aquatic foods from individual province were further analyzed. The level of gamma-HCH in bream (Megalobrama amblycephala) sample in Hubei province is 546.4microg/kg, which is 98.3% of all HCHs (exceeding the 0.1mg/kg HCHs EMRL in fish), the level of gamma-HCH in carp (Cyprinus carpio Linnaeus) sample in Heilongjiang province is 602.4microg/kg, which is 98.5% of all HCHs. The two samples polluted by Lindane were confirmed by GC-MS. The result suggests that Lindane has been used irregularly in some areas in China.