College of Environment and Energy, South China University of Technology, Guangzhou, China.
Chemosphere. 2013 Nov;93(8):1519-25. doi: 10.1016/j.chemosphere.2013.07.060. Epub 2013 Aug 22.
An intensive campaign was conducted in September 2012 to collect surface water samples along the tributaries of the Pearl River in southern China. Thirteen perfluoroalkyl acids (PFAAs), including perfluorocarboxylates (PFCAs, C4-C11) and perfluorosulfonates (PFSAs, C4, C6-C8, and C10), were determined using high-performance liquid chromatography/negative electrospray ionization-tandem mass spectrometry (HPLC/(-)ESI-MS/MS). The concentrations of total PFAAs (ΣPFAAs) ranged from 3.0 to 52 ng L(-1), with an average of 19±12 ng L(-1). The highest concentrations of ΣPFAAs were detected in the surface water of the Dong Jiang tributary (17-52 ng L(-1)), followed by the main stream (13-26 ng L(-1)) and the Sha Wan stream (3.0-4.5 ng L(-1)). Perfluorooctanoate (PFOA), perfluorobutane sulfonate (PFBS), and perfluorooctane sulfonate (PFOS) were the three most abundant PFAAs and on average accounted for 20%, 24%, and 19% of ΣPFAAs, respectively. PFBS was the most abundant PFAA in the Dong Jiang tributary, and PFOA was the highest PFAA in the samples from the main stream of the Pearl River. A correlation was found between PFBS and PFOA, which suggests that both of these PFAAs originate from common source(s) in the region. Nevertheless, the slope of PFBS/PFOA was different in the different tributaries sampled, which indicates a spatial difference in the source profiles of the PFAAs.
2012 年 9 月，在中国南方珠江支流沿线开展了一次集中的地表水采样活动。采用高效液相色谱/负离子电喷雾串联质谱法（HPLC/(-)ESI-MS/MS）测定了 13 种全氟烷基酸（PFAAs），包括全氟羧酸（PFCAs，C4-C11）和全氟磺酸（PFSAs，C4、C6-C8 和 C10）。总 PFAAs（ΣPFAAs）浓度范围为 3.0-52ng/L，平均值为 19±12ng/L。ΣPFAAs 的最高浓度出现在东江支流的地表水中（17-52ng/L），其次是珠江干流（13-26ng/L）和沙湾溪（3.0-4.5ng/L）。全氟辛烷酸（PFOA）、全氟丁烷磺酸（PFBS）和全氟辛烷磺酸（PFOS）是三种最丰富的 PFAAs，分别占 ΣPFAAs 的 20%、24%和 19%。PFBS 是东江支流中最丰富的 PFAAs，而 PFOA 是珠江干流样品中含量最高的 PFAAs。PFBS 和 PFOA 之间存在相关性，这表明这两种 PFAAs 都来自该地区的共同源。然而，在所采样的不同支流中，PFBS/PFOA 的斜率不同，这表明 PFAAs 的来源分布存在空间差异。
