应用MXRF分析技术测定植物叶片中环境元素

Measurements of Environmental Elements of Foliages with MXRF Analysis

应用一种使用X光透镜的微束X射线荧光(MXRF)分析技术,对北京不同地区的松针中重金属元素及S元素含量进行了测定和分析,探讨了它们与大气污染之间的关系;根据受损松针与正常松针检测结果的比较,确定了污染元素。对小叶黄杨叶片中部进行了二维微区自动扫描,得出了小叶黄杨叶片对各种金属元素的抗污染能力。研究结果从方法学上验证了使用X光透镜的MXRF分析技术在测量环境样品中的应用,为环境科研、污染治理和环境管理提供了科学依据。

A microbeam X-ray fluorescence（MXRF） analysis by employing X-ray lens is used to determine the content of heavy metal elements and sulphur of pine needles from different regions of Beijing city, and the relationship between content and air pollution is studied. The elements leading to air pollution are confirmed, according to the comparation of injured needle with normal one. Two dimensional micro automatic scanning of middle part of Buxus microphylla foliages is achieved, and the results show the anti-contaminated ability of Buxus microphylla foliages for several metal elements. The research validates the application of microbeam X-ray fluorescence analysis by employing X-ray lens in detecting envorinmental samples methodologically, which provides scientific basis for environmental research, pollution treatment and environmental management.