Polyfluoroalkyl compounds in the Canadian Arctic atmosphere
Polyfluoroalkyl compounds in the Canadian Arctic atmosphere
复制标题
DOI：
10.1071/en10131
复制
发表时间：
2011-01-01
影响因子：
4.3
通讯作者：
Halsall, Crispin
中科院分区：
文献类型：
--
作者：
Ahrens, Lutz;Shoeib, Mahiba;Halsall, Crispin
加拿大海岸警卫队的Amundsen号船在穿越拉布拉多海、哈德逊湾和加拿大北极地区的博福特海时，在大量的空气样本中测定了多氟烷基化合物（PFCs）。五个PFC类（即全氟烷基羧酸盐（PFCAs），多氟烷基磺酸盐（PFSAs），氟调聚物醇（FTOH），氟化磺酰胺（FOSAs），和磺酰胺乙醇（FOSE））分别在气相中收集的PUF/XAD-2三明治和颗粒相的玻璃纤维过滤器（GFFs）进行了分析。比较了两个研究组在采样、提取和仪器分析方面的方法性能。FTOH是气相中的主要PFC（20-138 pg m（-3）），其次是FOSE（0.4-23 pg m（-3））和FOSA（0.5-4.7 pg m（-3））。PFCA只能在颗粒相中定量，且水平较低（FOSA（类似于9%）> FTOH（类似于1%））。Sigma FOSA在气相中的浓度与环境空气温度之间存在显著的正相关性，这表明海冰积雪和地表海水等寒冷的北极表面可能会影响大气中的FOSA。
Polyfluoroalkyl compounds (PFCs) were determined in high-volume air samples during a ship cruise onboard the Canadian Coast Guard Ship Amundsen crossing the Labrador Sea, Hudson Bay and the Beaufort Sea of the Canadian Arctic. Five PFC classes (i.e. perfluoroalkyl carboxylates (PFCAs), polyfluoroalkyl sulfonates (PFSAs), fluorotelomer alcohols (FTOHs), fluorinated sulfonamides (FOSAs), and sulfonamidoethanols (FOSEs)) were analysed separately in the gas phase collected on PUF/XAD-2 sandwiches and in the particle phase on glass-fibre filters (GFFs). The method performance of sampling, extraction and instrumental analysis were compared between two research groups. The FTOHs were the dominant PFCs in the gas phase (20-138 pg m(-3)), followed by the FOSEs (0.4-23 pg m(-3)) and FOSAs (0.5-4.7 pg m(-3)). The PFCAs could only be quantified in the particle phase with low levels ( FOSAs (similar to 9%) > FTOHs (similar to 1%). Significant positive correlation between Sigma FOSA concentrations in the gas phase and ambient air temperature indicate that cold Arctic surfaces, such as the sea-ice snowpack and surface seawater could be influencing FOSAs in the atmosphere.