Passive sampling for target and nontarget analyses of moderately polar and nonpolar substances in water
Passive sampling for target and nontarget analyses of moderately polar and nonpolar substances in water
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DOI：
10.1002/etc.2260
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发表时间：
2013-08-01
影响因子：
4.1
通讯作者：
Grung, Merete
中科院分区：
文献类型：
--
作者：
Allan, Ian J.;Harman, Christopher;Grung, Merete
硅橡胶和低密度聚乙烯（LDPE）作为被动取样材料用于中极性和非极性物质的目标和非目标分析的适用性，通过在挪威奥斯陆的一条受污染的小河上现场部署取样器进行了评估。在Alna河的6个地点部署了相同表面积（但体积不同）的硅胶和LDPE样品49 d。通过气相色谱-质谱法（四极杆，单离子监测模式）进行定量目标分析表明，大量的多环芳烃，多氯联苯，两种聚合物材料中有机氯化合物的吸附与目前对样品材料中有机氯化合物的控制和富集方式的认识一致。对十溴联苯醚（BDE-209）观察到一些偏差，这可能与该物质的大分子尺寸有关，导致LDPE的低扩散率。用气相色谱法和高分辨率飞行时间质谱法进行靶和非靶分析，可以鉴定多种化学物质，包括有机磷化合物（OPCs）和麝香化合物（galaxolide和tonalid）。半定量分析显示有机硅材料中OPCs的数量增加，表明这些物质在LDPE中的吸收和扩散有一定的限制。总的来说，与LDPE相比，硅胶可以对具有更大范围对数辛醇-水分配系数值的化合物进行非目标筛选分析。环境化学，2013;32(2):1718-1726。(c) 2013 SETAC
The applicability of silicone rubber and low-density polyethylene (LDPE) as passive sampling materials for target and nontarget analyses of moderately polar and nonpolar substances was assessed through a field deployment of samplers along a small, polluted stream in Oslo, Norway. Silicone and LDPE samplers of identical surface area (but different volumes) were deployed at 6 sites in the River Alna for 49 d. Quantitative target analysis by gas chromatography-mass spectrometry (quadrupole, single-ion monitoring mode) demonstrated that masses of polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and organochlorine compounds absorbed in the 2 polymeric materials were consistent with the current understanding of the control and mode of accumulation in these sampler materials. Some deviation was observed for decabromodiphenyl ether (BDE-209) and may be linked to the large molecular size of this substance, resulting in lower diffusivity in the LDPE. Target and nontarget analyses with gas chromatography coupled to high resolution time-of-flight mass spectrometry allowed the identification of a wide range of chemicals, including organophosphate compounds (OPCs) and musk compounds (galaxolide and tonalid). Semiquantitative analysis revealed enhanced quantities of the OPCs in silicone material, indicating some limitation in the absorption and diffusion of these substances in LDPE. Overall, silicone allows nontarget screening analysis for compounds with a wider range of log octanol-water partition coefficient values than what can be achieved with LDPE. Environ Toxicol Chem 2013;32:1718-1726. (c) 2013 SETAC