University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
Environ Toxicol Chem. 2011 Jun;30(6):1412-20. doi: 10.1002/etc.514. Epub 2011 Mar 25.
Polar organic chemical integrative samplers (POCIS) are useful in monitoring for a wide range of chemicals in aquatic systems; however, a lack of available uptake rate data for compounds of environmental interest is one limitation in the application of these samplers to environmental studies. In this study, laboratory calibration experiments were conducted with POCIS for 65 compounds at 25°C under flowing conditions to determine chemical-specific uptake rates (R(s)). Experimental uptake rates measured in this study ranged from 0.034 to 1.33 L/d, and uptake rates were determined for 36 compounds with no previously reported values. Experimentally determined uptake rates were applied to data obtained from POCIS samplers deployed downstream of three wastewater treatment plant (WWTP) effluent discharges and in four surface waters influenced by agricultural runoff. Time-weighted average concentrations for atrazine and metolachlor determined using uptake rates generated in this study compare well with results from composited grab sampling previously conducted in agricultural watersheds in Nebraska, USA.
极性有机化学整合采样器（POCIS）在监测水生系统中广泛的化学物质方面非常有用；然而，对于环境中感兴趣的化合物，缺乏可用的吸收速率数据，这是将这些采样器应用于环境研究的一个限制。在这项研究中，在 25°C 下进行了实验室校准实验，在流动条件下用 POCIS 对 65 种化合物进行了实验，以确定特定化学物质的吸收速率（R(s)）。本研究中测量的实验吸收速率范围从 0.034 到 1.33 L/d，并且确定了 36 种以前没有报告值的化合物的吸收速率。实验确定的吸收速率应用于从三个污水处理厂（WWTP）排放口下游部署的 POCIS 采样器获得的数据，以及受农业径流影响的四个地表水。本研究中生成的吸收速率确定的莠去津和甲草胺的时间加权平均浓度与之前在美国内布拉斯加州农业流域进行的综合抓样结果非常吻合。
