Miravet R, Bonilla E, López-Sánchez J F, Rubio R
Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1-11, E-08028, Barcelona, Spain.
J Environ Monit. 2005 Dec;7(12):1207-13. doi: 10.1039/b509115b. Epub 2005 Oct 13.
A suitable method for the extraction of antimony species from plant materials prior to IC-HG-AFS analysis is presented. The extraction efficiency with different extraction systems using various aqueous and aqueous/solvent mixtures was initially evaluated by analysing the Virginia Tobacco Leaves Certified Reference Material. The concentration of antimony extracted was compared with the total antimony content in the plant material measured by HG-AFS after focused microwave-acidic digestion using HNO3 and H2O2. The proposed extraction procedures were applied to antimony speciation in several plants from a natural terrestrial environment impacted by mining activities. End-over-end agitation (4 h) followed by sonication (1 h) extraction using 0.1 mol l(-1) citric acid was found to provide the best extraction efficiency while also giving reliable speciation information. Both inorganic and methylantimony species were found in the extractable portion of some terrestrial plants.
本文介绍了一种在电感耦合等离子体质谱-氢化物发生-原子荧光光谱法（IC-HG-AFS）分析之前从植物材料中提取锑形态的合适方法。最初通过分析弗吉尼亚烟草叶标准参考物质，评估了使用各种水性和水/溶剂混合物的不同萃取系统的萃取效率。将萃取的锑浓度与使用硝酸和过氧化氢进行聚焦微波-酸性消解后通过氢化物发生-原子荧光光谱法（HG-AFS）测量的植物材料中的总锑含量进行比较。所提出的萃取程序应用于受采矿活动影响的天然陆地环境中几种植物的锑形态分析。发现使用0.1 mol l(-1)柠檬酸进行端对端搅拌（4小时），然后超声处理（1小时）萃取可提供最佳萃取效率，同时还能给出可靠的形态信息。在一些陆地植物的可萃取部分中发现了无机和甲基锑形态。
