Ptarmigan Bay (Yukon Coast, CA) POPs analysis on permafrost soils

Arctic permafrost soils are important reservoirs of contaminants on time scales ranging from days to millennia. The extensive work in the Arctic Monitoring and Assessment Program (AMAP) on Arctic contaminants highlights an acute lack of data on contaminants in Arctic soils, particularly below the permafrost table. Here we describe the work carried out on analyses of Persistent Organic Pollutants (POPs) in permafrost soils, in the Canadian study area at Ptarmigan Bay (Yukon, CA). Hexachlorobenzene, 13 congeners of Polychlorinated biphenyl (PCB) and 16 individual Polycyclic aromatic hydrocarbons (PAH) have been analysed in 95 active layer and permafrost core samples. The concentrations have been determined by using Thermo Scientific Dionex ASE 350 and Gas Chromatography - Triple Quadrupole Mass Spectrometry (Trace 1310 GC coupled with TSQ9000 TQMS, Thermo Scientific), following previously reported methods for the determination of organic contaminants in the atmospheric matrix and dry and wet deposition in the Venice Lagoon and the Antarctic atmospheric gas and particle phase (Gambaro et al., 2009; Piazza et al., 2013).北极永久冻土土壤是跨越数天至数千年时间尺度的重要污染物储库。北极监测与评估计划（Arctic Monitoring and Assessment Program, AMAP）针对北极污染物开展的大量研究凸显出，当前北极土壤尤其是永久冻土层以下的污染物数据极度匮乏。本研究针对加拿大育空地区（Yukon, CA）Ptarmigan湾的研究区域内永久冻土土壤中的持久性有机污染物（Persistent Organic Pollutants, POPs）分析工作进行了介绍。本研究对95份活动层及永久冻土岩心样品中的六氯苯、13种多氯联苯（Polychlorinated biphenyl, PCB）同系物以及16种单体多环芳烃（Polycyclic aromatic hydrocarbons, PAH）进行了分析。本研究采用赛默飞世尔科技（Thermo Scientific）Dionex ASE 350加速溶剂萃取仪以及气相色谱-三重四极杆质谱联用仪（Trace 1310气相色谱与TSQ9000三重四极杆质谱联用，赛默飞世尔科技），参考此前报道的用于测定大气基质、威尼斯泻湖干湿沉降以及南极大气气相与颗粒相中有机污染物的方法（Gambaro等，2009；Piazza等，2013），完成了样品中污染物浓度的测定。