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首页> 外文期刊>Environmental Science & Technology >Evaluation of the Use of Performance Reference Compounds in an Oasis-HLB Adsorbent Based Passive Sampler for Improving Water Concentration Estimates of Polar Herbicides in Freshwater
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Evaluation of the Use of Performance Reference Compounds in an Oasis-HLB Adsorbent Based Passive Sampler for Improving Water Concentration Estimates of Polar Herbicides in Freshwater

机译：在Oasis-HLB吸附剂型被动采样器中使用性能参考化合物改善淡水中极性除草剂的水含量估算的评估

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摘要

Passive samplers such as the Polar Organic Chemical Integrative Sampler (POCIS) are useful tools for monitoring trace levels of polar organic chemicals in aquatic environments. The use of performance reference compounds (PRC) spiked into the POCIS adsorbent for in situ calibration may improve the semiquantitative nature of water concentration estimates based on this type of sampler. In this work, deuterium labeled atrazine-desisopropyl (DIA-d5) was chosen as PRC because of its relatively high fugacity from Oasis HLB (the POCIS adsorbent used) and our earlier evidence of its isotropic exchange. In situ calibration of POCIS spiked with DIA-d5 was performed, and the resulting time-weighted average concentration estimates were compared with similar values from an automatic sampler equipped with Oasis HLB cartridges. Before PRC correction, water concentration estimates based on POCIS data sampling rates from a laboratory calibration exposure were systematically lower than the reference concentrations obtained with the automatic sampler. Use of the DIA-d5 PRC data to correct POCIS sampling rates narrowed differences between corresponding values derived from the two methods. Application of PRCs for in situ calibration seems promising for improving POCIS-derived concentration estimates of polar pesticides. However, careful attention must be paid to the minimization of matrix effects when the quantification is performed by HPLC-ESI-MS/MS.
机译：诸如极性有机化学综合采样器（POCIS）之类的无源采样器是用于监视水生环境中痕量极性有机化学物的有用工具。使用掺入POCIS吸附剂中的性能参考化合物（PRC）进行原位校准可以改善基于此类采样器的水浓度估算值的半定量性质。在这项工作中，氘标记的at去津-去异丙基（DIA-d5）被选为PRC，因为它来自Oasis HLB（使用的POCIS吸附剂）的相对较高的逸度，以及我们较早地证明其各向同性交换的证据。对掺有DIA-d5的POCIS进行原位校准，并将所得的时间加权平均浓度估计值与配备Oasis HLB滤芯的自动进样器的相似值进行比较。在进行PRC校正之前，基于来自实验室校准暴露的POCIS数据采样率的水浓度估算值总体上低于使用自动采样器获得的参考浓度。使用DIA-d5 PRC数据校正POCIS采样率可以缩小从两种方法得出的相应值之间的差异。将PRCs用于原位校准似乎有望改善POCIS衍生的极性农药浓度估计值。但是，当通过HPLC-ESI-MS / MS进行定量时，必须特别注意基质效应的最小化。

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  • 来源
    《Environmental Science & Technology》 |2010年第5期|p.1713-1719|共7页
  • 作者

    NICOLAS MAZZELLA; rnSOPHIE LISSALDE; SYLVIA MOREIRA; rnFHANCOIS DBLMAS; rnPATRICK MAZELLIER; rnJAMES N. HUCKINS;

  • 作者单位

    Cemagref, UR REBX, 50 Avenue de Verdun, Gazinet, F-33612 Ceslas Cedex, France;

    rnCemagref, UR REBX, 50 Avenue de Verdun, Gazinet, F-33612 Ceslas Cedex, France;

    rnCemagref, UR REBX, 50 Avenue de Verdun, Gazinet, F-33612 Ceslas Cedex, France;

    rnCemagref, UR REBX, 50 Avenue de Verdun, Gazinet, F-33612 Ceslas Cedex, France;

    rnLPTC-ISM, UMR CNRS 5255, Universite de Bordeaux - IUT de Perigueux. Rue du doyen Joseph Lajugie, 24019 Perigueux Cedex;

    rnU.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri 65201;

  • 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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