title: Assessing the transfer of pesticides to the atmosphere during and after application. Development of a multiresidue method using adsorption on Tenax and thermal desorption-GC/MS.
abstract: An air sampling and analytical method based on adsorption on porous polymer (Tenax TA) followed by automatic thermal desorption (ATD) and GC/MS analysis was developed for ten pesticides commonly used on major crops in Britanny and some of their metabolites in air (from spray drift and volatilisation transfer processes): alachlor, atrazine (and two major degradation products: deethylatrazine and deisopropylatrazine), carbofuran, cyprodinil, epoxyconazole, iprodione (and 3,5-dichloroaniline), lindane (and -HCH, its isomer), metolachlor, terbuconazole and trifluralin. This method was established with special consideration for optimal thermal desorption conditions, linear ranges, limits of detection and quantification. Moreover, collection efficiencies of Tenax TA at room temperature were examined. This method was then applied to the determination of ambient pesticide levels during the spraying season at a rural area. The method was also applied to determine the vertical gradient of alachlor concentrations on a treated maize parcel to evaluate volatilisation fluxes.
authors.affiliation: Ecole Nationale de la Santé Publique, Laboratoire d'Etude et de Recherche en Environnement et Santé, Avenue Prof. Léon Bernard, 35043 Rennes Cedex, France. obriand@ensp.fr
authors.forename: Olivier
authors.initials: O
authors.lastname: Briand
authors.forename: Maurice
authors.initials: M
authors.lastname: Millet
authors.forename: Florence
authors.initials: F
authors.lastname: Bertrand
authors.forename: Michel
authors.initials: M
authors.lastname: Clément
authors.forename: René
authors.initials: R
authors.lastname: Seux
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods / Q000592:standards; D006540:Herbicides / Q000032:analysis; D010575:Pesticides / Q000032:analysis*; D011108:Polymers
chemical_list: D006540:Herbicides; D010575:Pesticides; D011108:Polymers; C010514:tenax