Vrana Branislav, Mills Graham A, Kotterman Michiel, Leonards Pim, Booij Kees, Greenwood Richard
School of Biological Sciences, University of Portsmouth, King Henry Building, King Henry I Street, Portsmouth PO1 2DY, United Kingdom.
Environ Pollut. 2007 Feb;145(3):895-904. doi: 10.1016/j.envpol.2006.04.030. Epub 2006 Aug 21.
Passive sampling of dissolved pollutants in water has been gaining acceptance for environmental monitoring. Previously, an integrative passive sampler consisting of a C18 Empore disk receiving phase saturated with n-octanol and fitted with low density polyethylene membrane, was developed and calibrated for the measurement of time weighted average (TWA) concentrations of hydrophobic pollutants in water. In this study, the exchange kinetics were modelled to obtain a better understanding of the mechanism of the accumulation process and to enable the measurement of TWA concentrations of hydrophobic pollutants in the field. An empirical relationship that enables the calculation of in situ sampling rates of chemicals using performance reference compounds was derived and its application was demonstrated in a field study in which TWA aqueous concentrations estimated from sampler data for target analytes were compared with TWA concentrations obtained from spot samples of water collected regularly during the sampler deployment period.
水中溶解污染物的被动采样在环境监测中越来越受到认可。此前，已开发出一种由用正辛醇饱和的C18 Empore盘接收相和低密度聚乙烯膜组成的综合被动采样器，并对其进行了校准，用于测量水中疏水性污染物的时间加权平均（TWA）浓度。在本研究中，对交换动力学进行了建模，以更好地理解积累过程的机制，并能够测量现场疏水性污染物的TWA浓度。推导了一种使用性能参考化合物计算化学品原位采样率的经验关系，并在一项现场研究中展示了其应用，在该研究中，将根据采样器数据估算的目标分析物的TWA水相浓度与在采样器部署期间定期采集的水样现场样本获得的TWA浓度进行了比较。
