全国23个城市水源水中邻苯二甲酸酯代谢物浓度调查

采用UPLC-MS/MS方法对中国23个城市的90个自来水厂141个水源水样中5种常用PAEs的8种代谢产物进行检测.结果发现，所有自来水水源水中均检出了MPAEs，邻苯二甲酸单正丁酯（MnBP）检出浓度最高，为74.7ng/L.水源水中邻苯二甲酸单乙酯（MEP），邻苯二甲酸单异丁酯（MiBP）和MnBP浓度与邻苯二甲酸二乙酯（DEP），邻苯二甲酸二异丁酯（DiBP）和邻苯二甲酸二正丁酯（DnBP）浓度分别呈显著相关，表明两者可能是同源.邻苯二甲酸二（2-乙基己基）酯（DEHP）二级代谢产物所占DEHP一级、二级代谢产物浓度和（∑DEHP）为4.0%±5.6%，和天然水体中DEHP的微生物降解结果类似，水源水中的MPAEs可能来自PAEs在自然水体中的微生物降解.

National survey of phthalate metabolites in drinking source water of 23 cities in China

Eight metabolites of 5 PAEs were determined in 141 drinking source water samples from 90 drinking water supply plants of 23 cities in China using UPLC-MS/MS method. MPAEs were detected in all drinking source water samples, and the average concentration of mono-n-butyl phthalate (MnBP) was the highest (74.7ng/L) among target MPAEs. The concentrations of monoethyl phthalate (MEP), mono-iso-butyl phthalate (MiBP) and MnBP in source water were significantly correlated with those of diethyl phthalate (DEP), di-iso-butyl phthalate (DiBP) and di-n-butyl phthalate (DnBP), respectively, suggesting common source for MPAEs and their corresponding PAEs. The percentage of secondary metabolites relative to∑DEHP (total concentrations of primary and secondary metabolites of DEHP) (4.0% ±5.6%) in source water was comparable to that from the microbiological degradation of DEHP in aqueous environment, suggesting that these metabolites in drinking source water were mainly from the microbiological degradation of PAEs in aqueous environment.