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首页> 外文期刊>Environmental Science & Technology >Global Aquatic Passive Sampling: Maximizing Available Resources Using a Novel Exposure Procedure
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Global Aquatic Passive Sampling: Maximizing Available Resources Using a Novel Exposure Procedure

机译：全球水生被动采样：使用新型暴露程序最大化可用资源

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摘要

A quatic integrative passive sampling for the monitoring of persistent organic pollutants (POPs) has gained mo mentum over the past decade and a call was made recently to establish a global network of aquatic sampling sites.' We propose to expand such a network by using a novel exposure procedure consisting of actively towing aquatic passive sampling devices through water.2 The increase in water turbulences near the sampler when towed through water during "mobile" exposures causes substantially higher sam pling rates, Rs (equivalent volume of water extracted by the sampler per unit of time) than those observed during con ventional "static" exposures. A recent trial demonstrated that Rs values in excess of 100-200 L d-l were possible when towing standard size semipermeable membrane devices (460 cm2) at a speed of approximately 1.3 knot.2 With an appropriate choice of sampler size/configuration (for ana-lytes under linear uptake, Rs depends directly on the surface area of the sampler), measurements of POPs such as those defined by the Stockholm Convention may be possible while dramatically reducing the exposure time. This signifies that the data obtained become spatially rather temporally inte grated. Anticipated Rs as high as 10 L d~' would not result in substantial changes in limits of detection even when expo sure times are kept below 1—2 days. Measurements with limits of detection in the low pg L"' needed for compounds such as polychlorinated biphenyls or polybrominated di phenyl ethers may still be possible.
机译：在过去十年中，用于监测持久性有机污染物（POPs）的水生综合被动采样获得了极大的发展，最近呼吁建立一个全球水生采样站点网络。我们建议通过使用一种新颖的暴露程序来扩展这种网络，该程序包括通过水主动拖曳水生无源采样设备。2在“移动”暴露过程中被拖曳穿过水时，采样器附近水湍流的增加会导致更高的采样率Rs （每单位时间采样器抽取的水的等效体积）比常规“静态”暴露期间所观察到的数量大。最近的一项试验表明，当以大约1.3节的速度拖曳标准尺寸的半透膜装置（460 cm2）时，Rs值可能超过100-200 Ldl。2适当选择采样器的尺寸/配置（用于分析裂解液在线性吸收下，Rs直接取决于采样器的表面积），可以测量POP（如《斯德哥尔摩公约》所定义的持久性有机污染物），同时显着减少暴露时间。这表示获得的数据在空间上在时间上变得完整。即使将曝光时间保持在1-2天以下，预期的Rs高达10 L d〜'也不会导致检测限的实质性变化。仍可能进行化合物（例如多氯联苯或多溴二苯醚）所需的低pg L“'级检测限的测量。

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  • 来源
    《Environmental Science & Technology》 |2011年第15期|p.6233-6234|共2页
  • 作者

    Ian John Allan; Christopher Harman;

  • 作者单位

    Norwegian Institute for Water Research, Gaustadalleen 21, NO-0349, Oslo, Norway;

    Norwegian Institute for Water Research, Gaustadalleen 21, NO-0349, Oslo, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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