大运河丰水期水体中全氟化合物的分布

应用固相萃取分离富集与高效液相色谱/电喷雾负电离源串联质谱法分析了2014年6月采自京杭大运河水体41个样品中17 种全氟化合物，对其污染现状及分布进行了讨论，并对污染来源进行了分析.大运河水体中的全氟化合物总浓度（∑PFCs）范围为7.4~153.5ng/L.PFCs含量有一个大致从南到北递减的趋势.大运河江南部分∑PFCs在杭州嘉兴河段处出现高值点.长江以北部分在德州地区出现高值点，南方大部分河段以PFOA为主导化合物，而在北方河段PFOA的主导性降低.对大运河沿途地区城镇化、经济水平与各地区大运河水体平均∑PFCs浓度的关系进行了比较，结果表明具有较高的相关性.

Geographical distribution of perfluorinated compounds in waters along the Grand Canal during wet season

The contamination status and spatial distributions of perfluorinated compounds (PFCs) were investigated in waters of the Grand Canal in eastern China during 2014. A total of 41samples of surface waters were collected. High performance liquid chromatography/negative electrospray ionization-tandem mass spectrometry (HPLC/ESI-MS/MS) was used to identify and quantify PFCs. The total concentrations of PFCs (∑PFCs) ranged from 7.4~153.5ng/L, generally showing a trend of deceasing from south to north. ∑PFCs were greater in Hangzhou-Jiaxing section than those in other sections. For the northern Canal, the highest ∑PFCs occurred in Dezhou section. PFOA was the prevalent PFC in the southern part of the Canal and its prevalence decreased in general in the northern part. Comparisons are made between the population density and the gross domestic product (GDP) of cities or prefectures located in the Grand Canal sampling areas in 2014 and the corresponding average ∑PFCs in waters.