title: Calibration and field performance of triolein embedded acetate membranes for passive sampling persistent organic pollutants in water.
abstract: Triolein embedded cellulose acetate membrane (TECAM) passive samplers provide potentially powerful tool for monitoring time weighted average concentrations (C(TWA)) of trace hydrophobic organic contaminants in water. To study the field performance of TECAM, exchange kinetics of chemicals between water and TECAM were studied at different temperature and water flow rates. Results showed that the uptake rate constant (k(u)) in TECAM was less sensitive to temperature variation than the SPMD and Chemcatcher. The k(u) in TECAM was sensitive to even a slight change of the flow rate, which required the field calibration using performance reference compounds (PRCs). To estimate C(TWA) by TECAM, both empirical model and WBL model were compared in laboratory conditions, and only small differences were observed between the predicted and measured k(u). Field validation was conducted to test the sampler performance alongside spot sampling. A good agreement of water concentration was obtained by the two sampling techniques.
authors.affiliation: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Tang
authors.forename: Shan
authors.initials: S
authors.lastname: Chen
authors.forename: Yiping
authors.initials: Y
authors.lastname: Xu
authors.forename: Wenjue
authors.initials: W
authors.lastname: Zhong
authors.forename: Mei
authors.initials: M
authors.lastname: Ma
authors.forename: Zijian
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000085:Acetates / Q000737:chemistry*; D002138:Calibration; D004784:Environmental Monitoring / Q000295:instrumentation / Q000379:methods*; D005374:Filtration / Q000295:instrumentation*; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry; D014304:Triolein / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D000085:Acetates; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D014304:Triolein