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Polydimethylsiloxane Rods for the Passive Sampling of Pesticides in Surface Waters

Irstea, UR MALY, 5 rue de la Doua, CS70077, F-69626 Villeurbanne Cedex, France
Institut des Sciences Analytiques, UMR 5280, Université de Lyon, Université Claude Bernard Lyon 1, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne Cedex, France
Author to whom correspondence should be addressed.
Water 2013, 5(3), 1366-1379;
Received: 19 June 2013 / Revised: 19 July 2013 / Accepted: 27 August 2013 / Published: 11 September 2013
(This article belongs to the Special Issue Analytical Chemistry of Water)
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In this work, the low cost synthesis of polydimethylsiloxane (PDMS) rods is described, and the performances of this new passive sampling device (in laboratory and in situ) are compared to the passive stir bar sorptive extraction (SBSE) for the monitoring of pesticides from different classes (herbicides, insecticides and fungicides) in surface waters. The influence of synthesis parameters of PDMS rods (i.e., heating temperature, heating time and relative amount of curing agent) were assessed regarding their efficiency for the extraction of the target pesticides through a Hadamard’s experimental design. This allowed the determination of the effect of the three parameters on the sorption of pesticides within four experiments. Thus, specific conditions were selected for the synthesis of the PDMS rods (heating at 80 °C for 2 h with 10% of curing agent). Laboratory experiments led to similar to lower extraction recovery in the PDMS rods in comparison with passive SBSE, depending on the pesticide. The in situ application demonstrated the efficiency of the PDMS rods for the passive sampling of the target pesticides in river water, although lower amounts of pesticides were recovered in comparison with passive SBSE. So, these very low cost PDMS rods could be used as an alternative to passive SBSE for large-scale monitoring campaigns. View Full-Text
Keywords: polydimethylsiloxane (PDMS) rods; passive sampling; SBSE; pesticides; surface waters polydimethylsiloxane (PDMS) rods; passive sampling; SBSE; pesticides; surface waters

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Assoumani, A.; Margoum, C.; Lassalle, Y.; Herbreteau, B.; Faure, K.; Coquery, M.; Randon, J. Polydimethylsiloxane Rods for the Passive Sampling of Pesticides in Surface Waters. Water 2013, 5, 1366-1379.

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