Passive sampling of perfluorinated chemicals in water: In-situ calibration

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• 作者：Sarit L. Kaserzon ; Darryl W. Hawker ; Kees Booij ; Dominique S. O'Brien ; Karen Kennedy ; Eti毛nne L.M. Vermeirssen ; Jochen F. Mueller
• 关键词：Perfluorinated chemicals ; Passive sampling ; Polar organic chemical integrative sampler ; Passive flow monitor ; Sampling rate ; Flow rate
• 刊名：Environmental Pollution
• 出版年：March, 2014
• 年：2014
• 卷：186
• 期：Complete
• 页码：98-103
• 全文大小：382 K

文摘

Perfluorinated chemicals (PFCs) have been recognised as environmental pollutants that require monitoring. A modified polar organic chemical integrative sampler (POCIS) is able to quantify aqueous PFCs. However, with varying external water velocity, PFC sampling rates (R_s) may change, affecting accuracy of derived water concentrations. To facilitate field deployment of this sampler, two methods of in-situ calibration were investigated: performance reference compounds (PRCs) and passive flow monitors (PFMs). Increased R_s's (by factors of 1.2-1.9) with PFM loss rate (g聽d^鈭?) were observed for some PFCs. Results indicate PFMs can be used to correct PFC specific R_s's for more reliable estimates of environmental concentrations with a precision of about 0.01聽L聽d^鈭?. Empirical models presented provide an improved means for aquatic monitoring of PFCs. The PRC approach was unsuccessful, confirming concern as to its applicability with such samplers.