Briand Olivier, Millet Maurice, Bertrand Florence, Clément Michel, Seux René
Ecole Nationale de la Santé Publique, Laboratoire d'Etude et de Recherche en Environnement et Santé, Avenue Prof. Léon Bernard, 35043 Rennes Cedex, France.
Anal Bioanal Chem. 2002 Nov;374(5):848-57. doi: 10.1007/s00216-002-1526-1. Epub 2002 Oct 3.
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.
开发了一种空气采样和分析方法，该方法基于在多孔聚合物（Tenax TA）上进行吸附，随后进行自动热脱附（ATD）和气相色谱/质谱（GC/MS）分析，用于检测布列塔尼主要农作物上常用的十种农药及其在空气中的一些代谢物（来自喷雾漂移和挥发转移过程）：甲草胺、莠去津（及其两种主要降解产物：去乙基莠去津和去异丙基莠去津）、克百威、嘧菌环胺、环氧唑菌唑、异菌脲（及其异构体3,5-二氯苯胺）、林丹（及其异构体β-六氯环己烷）、异丙甲草胺、戊唑醇和氟乐灵。该方法的建立特别考虑了最佳热脱附条件、线性范围、检测限和定量限。此外，还研究了Tenax TA在室温下的采集效率。然后将该方法应用于农村地区喷洒季节环境中农药水平的测定。该方法还用于测定处理过的玉米地块中甲草胺浓度的垂直梯度，以评估挥发通量。
