Determination of uptake kinetics and sampling rates for 56 organic micropollutants using pharmaceutical POCIS

TALANTA

卷:109

Article

Morin, Nicolas¹  Camilleri, Julien²  Cren-Olive, Cecile²  Coquery, Marina¹  Miege, Cecile¹ 

[1] Irstea, UR MALY, F-69626 Villeurbanne, France

[2] Univ Lyon 1, UMR ISA 5280, Dept Serv Cent & Anal, CNRS USR59,ENS Lyon, F-69100 Villeurbanne, France

关键词: POCIS;    Sampling rates;    Uptake kinetics;    Calibration system;    Priority and emerging substances;   

DOI  :  10.1016/j.talanta.2013.01.058

来源: Elsevier

【 摘 要 】

The literature increasingly reports sampling rates (R-s) for Polar Organic Chemical Integrative Samplers (POCIS) but the data obtained come from various calibration systems that are not always well-defined (agitation, temperature, measured micropollutant concentrations in water, ... ). In order to obtain accurate laboratory R-s for priority and emerging substances, POCIS need to be exposed in a robust and well-defined calibration system. Thus, we built a flow-through calibration system containing tap water spiked with 56 organic micropollutants (alkylphenols and phenols, hormones, pesticides, pharmaceuticals, UV filter). POCIS were immersed for up to 28 days. Tap water micropollutant concentrations and additional parameters (temperature, pH, conductivity, dissolved organic carbon, flow velocities) were kept constant and controlled throughout the calibration experiment. Based on the observed uptake kinetics, we distinguished four types of micropollutant accumulation patterns: curvilinear accumulation (30 molecules, group 1), accumulation with an inflexion point (13 molecules, group 2), random accumulation (eight molecules, group 3), and no or very low accumulation (five molecules, group 4). R-s was calculated for 43 out of 56 micropollutants (groups 1 and 2). Calculated R-s values ranged from 0.030 L/d to 0.398 L/d. POCIS can supply TWA concentrations for hormones, pesticides, several pharmaceuticals, a few alkylphenols, and the UV filter. Our R-s results are generally less than two fold-different (higher or lower depending on target molecule) to the literature data using the same type of calibration system or for micropollutants with log K-ow > 2.65. We found a quadratic correlation between R-s and log D for betablockers, herbicides and hormones. (c) 2013 Elsevier B.V. All rights reserved.

【 授权许可】

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