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Method for the in Situ Calibration of a Passive Phosphate Sampler in Estuarine and Marine Waters

机译：河口和海水中被动磷酸盐采样器的原位校准方法

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摘要

Passive samplers for phosphate were calibrated in the laboratory over a range of flow velocities (0-27 cm s !) and ionic strengths (0-0.62 mol kg"1). The observed sampling rates were between 0.006 and 0.20 L d"1. An empirical model allowed the estimation of these sampling rates with a precision of 8.5%. Passive flow monitors (PFMs), based on gypsum dissolution rates, were calibrated for the same range of flow velocities and ionic strength. Mass loss rates of the PFMs increased with increasing ionic strength. We demonstrate that this increase is quantitatively accounted for by the increased gypsum solubility at higher ionic strengths. We provide a calculation scheme for these solubilities for an environmentally relevant range of temperatures and salinities. The results imply that co-deployed PFMs can be used for estimating the flow effect on the in situ sampling rates of the phosphate samplers, and we expect that the same may hold for other passive samplers.
机译：在实验室中，在一定范围内的流速（0-27 cm s！）和离子强度（0-0.62 mol kg“ 1”）上校准了磷酸盐被动采样器。观察到的采样率在0.006至0.20 L d“ 1之间。一个经验模型允许以8.5％的精度估算这些采样率。基于石膏溶解速率的无源流量监测器（PFM）已针对相同范围的流速和离子强度进行了校准。 PFM的质量损失率随离子强度的增加而增加。我们证明，这种增加是由较高离子强度下石膏溶解度增加引起的。我们提供了与环境相关的温度和盐度范围内这些溶解度的计算方案。结果表明，可以将共部署的PFM用于估计流量对磷酸盐采样器的原位采样率的影响，我们希望其他被动采样器也可以使用这种方法。

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  • 来源
    《Environmental Science & Technology》 |2011年第7期|p.2871-2877|共7页
  • 作者

    Dominique S. OBrien; Kees Booij; Darryl W. Hawker; Jochen F. Mueller;

  • 作者单位

    The University of Queensland, National Research Centre for Environmental Toxicology (Entox), 39 Kessels Road, Coopers Plains,Queensland 4108, Australia;

    Royal Netherlands Institute for Sea Research, P.O. Box 59, 1790 AB Texel, The Netherlands;

    School of Environment, Griffith University, Nathan, Queensland 4111, Australia;

    The University of Queensland, National Research Centre for Environmental Toxicology (Entox), 39 Kessels Road, Coopers Plains,Queensland 4108, Australia;

  • 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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