Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; Central Laboratory, Qingdao Agricultural University, Qingdao 266109, China.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
Chemosphere. 2018 Aug;205:524-530. doi: 10.1016/j.chemosphere.2018.04.143. Epub 2018 Apr 23.
Perfluoroalkyl acids (PFAAs) are ubiquitous pollutants present in various environmental media, including marine sediments. A method was proposed for the determination of 17 target PFAA analytes in marine sediment samples (n = 49) collected from the Yangtze Estuary and East China Sea. The proposed method involves the use of an optimized pretreatment procedure and ultrahigh-performance liquid chromatography electrospray ionization-tandem mass spectrometry in dynamic multiple reaction monitoring mode. The method relied on extraction cycles using methanol followed by concentration, filtration, and small volume injection to UHPLC-MS/MS. The recovery, time efficiency, and detection limit of the proposed method are improved relative to those of traditional methods. Limits of detection varied from 0.003 to 0.045 ng/g, and spike recoveries to sediment ranged from 90% to 110% with suitable precisions (1.7%-14.6%). PFAAs were widely present in the samples, and ΣPFAAs ranged from 0.67 ng/g dw to 36.75 ng/g dw. Results indicated that terrigenous input strongly influences PFAA distribution in sediments from the study areas. Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonate (PFOS) were identified as the dominant perfluorocarboxylic acid (PFCA) and perfluoroalkylsulfonate (PFSA) in sediment samples from the Yangtze Estuary and the East China Sea. Preliminary environmental risk assessment indicated that PFOS may pose a higher environmental risk than PFOA. Furthermore, risk quotient values indicated that PFOS poses a significant risk to the aquatic ecosystem of the study areas.
全氟烷基酸（PFAAs）是普遍存在于各种环境介质中的污染物，包括海洋沉积物。本研究提出了一种测定长江口和东海海洋沉积物中 17 种目标 PFAAs 分析物的方法（n=49）。该方法采用优化的预处理程序和超高效液相色谱-电喷雾串联质谱在动态多反应监测模式下进行分析。该方法依赖于甲醇提取循环，然后浓缩、过滤和小体积注入到 UHPLC-MS/MS。与传统方法相比，该方法的回收率、时间效率和检测限均得到了提高。检出限范围为 0.003-0.045ng/g，沉积物中添加回收率范围为 90%-110%，具有适当的精密度（1.7%-14.6%）。在样品中广泛存在 PFAAs，ΣPFAAs 范围为 0.67ng/g dw 至 36.75ng/g dw。结果表明，陆源输入对研究区域沉积物中 PFAAs 的分布有很大影响。全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）被确定为长江口和东海沉积物中主要的全氟羧酸（PFCA）和全氟烷基磺酸盐（PFSA）。初步环境风险评估表明，PFOS 可能比 PFOA 具有更高的环境风险。此外，风险商值表明，PFOS 对研究区域的水生生态系统构成重大风险。
