应用重金属和有机污染物对人体健康的风险评价理论反推牡蛎安全消费量

Estimation of safe consuming amount of oyster based on the risk assessing theory of trace metal and organic contaminants on human health

为了提供牡蛎食用安全性参考信息,文章根据有毒化学物质的人体健康风险评估计算式,提出了牡蛎适宜消费量推算方法;对2007年春季在南海北部沿岸23个海湾采集的近江牡蛎(Crassostrea rivularis)样品,用气相色谱法测定了其中有机氯农药、多氯联苯的含量,用原子吸收分光光度法和原子荧光分光光度法测定了其中重金属的含量,推算了近江牡蛎的适宜消费量。结果能清晰地显示牡蛎采集海域、有毒化学物质种类对应的近江牡蛎软组织日均适宜消费量。

In order to supply safety information of oyster consumption for public reference, contaminants contents in Jinjiang oyster （ Crassostrea rivularis） were investigated. Samples of the animal were collected along the coast of south China in spring of 2007, and residues of some chlorinated hydrocarbons and heavy metals were measured by gas chromatograph-electron capture detector, atomic absorption spectrometry and atomic fluorescence spectrometry. An ＂appropriate consumption＂ concept was defined for the first time, and its calculating formula was derived from the calculation of margin of exposure to chemicals. Based on concentrations in oysters and reference dose of concern chemicals, presuming that exposure risk is acceptable if margin of exposure is not greater than one, we conjec- tured appropriate oyster consumption. It is easy to find an appropriate consumption of comestible tissue of the oYster from a certain sampling bay.