title: Determination of deployment specific chemical uptake rates for SPMD and PDMS using a passive flow monitor.
abstract: Passive sampling techniques facilitate the time-integrated measurement of pollutant concentrations through the use of a selective receiving phase. Accurate quantification using passive sampling devices rely on the implementation of methods that will negate the effects of environmental factors (flow, temperature, etc.) or that will allow the calculation of the chemical specific rates of uptake (R(s)) into the passive sampler employed. We have applied an in situ calibration technique based on the dissolution of gypsum to measure the average water velocity to which a sampler has been exposed. We demonstrate that the loss of gypsum from the passive flow monitor (PFM) can be applied to predict changes in R(s) dependent on flow when using the absorbent SPMD (semipermeable membrane device) and PDMS (polydimethyl siloxan) passive samplers. The application of the PFM will enhance the accuracy of measurements made when calculating and reporting environmental pollutant concentrations using a passive sampling device.
authors.affiliation: The University of Queensland, National Research Centre for Environmental Toxicology (Entox), 39 Kessels Rd, Coopers Plains, QLD 4108, Australia. dominiquesaraobrien@gmail.com
authors.forename: Dominique
authors.initials: D
authors.lastname: O'Brien
authors.forename: Tatiana
authors.initials: T
authors.lastname: Komarova
authors.forename: Jochen F
authors.initials: JF
authors.lastname: Mueller
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004784:Environmental Monitoring / Q000295:instrumentation*; D006540:Herbicides / Q000032:analysis / Q000737:chemistry; D007306:Insecticides / Q000032:analysis / Q000737:chemistry; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D004129:Dimethylpolysiloxanes; D006540:Herbicides; D007306:Insecticides; D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; C013830:baysilon