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Comparative Study of Risk Assessment Approaches Based on Different Methods for Deriving DNEL and PNEC of Chemical Mixtures

机译:基于不同方法的衍生达釜和PNEC的不同方法的风险评估方法的比较研究

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Most living organisms are actually exposed to chemical mixtures rather than individual substances. But current chemical risk assessment frequently fo-cuses on the single chemical substances. The European Union presented some methods in the draft technical guidance notes for deriving DNEL (Derived No Ef-fect Level) and PNEC (Predicted No Effect Concentration) for risk assessment of mixtures. This case study shows that the differences of DNELs and PNECs of mixtures (2 coating materials) based on two methods (KCC and CR methods) and explains why such differences are generated. The differences of DNELs and PNECs of the mixtures based on the two methods were estimated by 1.21 and 2.31 times respectively. Through the theoretical analysis on influence factors affecting DNEL and PNEC, it could be recognized that the difference between two methods can significantly increase in proportion to the number of substances having similar hazard and weight fraction.
机译:大多数生物体实际上暴露于化学混合物而不是单个物质。但目前的化学风险评估经常在单一化学物质上进行味道。欧洲联盟提出了一些方法在衍生达露的技术指导说明草案中,用于衍生达污水(没有EF-FECT级别)和PNEC(预测没有影响浓度)的混合物的风险评估。这种情况研究表明,基于两种方法(KCC和CR方法)的混合物(2涂层材料)的DNELS和PNEC的差异,并解释了为什么产生这种差异。基于两种方法的混合物的DNEL和PNEC的差异分别估计为1.21和2.31次。通过影响达陶器和PNEC的影响因素的理论分析,可以认识到,两种方法之间的差异与具有相似危害和重量分数的物质的数量比例显着增加。

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