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目的运用毒理学关注阈值(TTC)方法对邻苯二甲酸二甲酯(DMP)和邻苯二甲酸二乙酯(DEP)两种邻苯二甲酸酯类物质进行风险评估。方法利用TTC决策树方法和Toxtree软件对DMP和DEP进行Cramer结构分类;利用2002年中国居民营养与健康状况调查数据和24类主要食物中DMP和DEP的含量数据,估计中国不同年龄组人群DMP和DEP的膳食暴露量,并按照TTC决策树方法对其进行风险评估。结果 DMP和DEP属于Cramer I类结构,其对应的TTC阈值为30μg/kg BW。中国居民的DMP和DEP最大暴露量分别为2.43和1.72μg/kg BW,占TTC阈值的8.10%和5.72%;划分成8个性别年龄组后的最大暴露量分别为2.01和1.44μg/kg BW,占TTC阈值的6.71%和4.79%。结论中国居民膳食DMP和DEP的健康风险较低,不需要引起健康关注。
Objective To assess the risk of two phthalates, dimethyl phthalate (DMP) and diethyl phthalate (DEP), using the Toxicology Concern Threshold (TTC) method. Methods The TMP tree and Toxtree software were used to classify DMP and DEP in Cramer structure. Based on the data of Chinese residents’ nutrition and health status in 2002 and the content of DMP and DEP in 24 kinds of main foods, the DMP and DEP in different age groups in China were estimated. DEP dietary exposure and conduct risk assessments according to the TTC decision tree approach. Results DMP and DEP belong to Cramer class I structure with a corresponding TTC threshold of 30 μg / kg BW. The maximum DMP and DEP exposure of Chinese residents were 2.43 and 1.72 μg / kg BW, respectively, accounting for 8.10% and 5.72% of the TTC threshold. The maximum exposure to the eight sex age groups was 2.01 and 1.44 μg / kg BW, respectively , Accounting for 6.71% and 4.79% of the TTC threshold. Conclusions Dietary DMP and DEP in Chinese residents have a lower health risk and do not require health concerns.