利用国产TM-陶瓷纤维马弗炉进行样品预处理附生苔藓对大气中重金属元素的生物富集中子活化方法研究  

Study of Epiphytic Mosses Using as Biomonitors of Heavy Metal Atmospheric Deposition by INAA

作　　者：张朝晖[1] O.Stan 

机构地区：[1]中国科学院高能物理研究所核分析技术开放实验室,北京100080 [2]俄罗斯联合原子核研究院弗兰克中子物理实验室杜布纳,莫斯科地区141908

出　　处：《现代科学仪器》2000年第2期58-59,共2页Modern Scientific Instruments

摘　　要：苔藓生物监测器对重金属的特征富集能够反映出大气沉降中的重金属污染程度 ,利用中子活化法的多元素同时分析技术测定苔藓植物体内的元素含量时 ,样品的均一性十分关键。利用新型陶瓷纤维马弗炉的快速灰化方法 ,可以高效地解决这一问题。同时 ,灰化样品大大减少了样品的体积 ,节省了照射孔道空间 ,避免了其它元素的污染。通过协作实验室的方法对比 ,同种苔藓的两组测定结果表明灰化样品没有造成元素的损失。The accumulation of heavy metal elements in atmospheric deposition by moss biomonitor can reflect the extension of heavy metal atmospheric pollution. It is a committed step of the homogeneity of the moss sample for the irradiation and detection using instrumental neutron activation analysis as the multielement simultaneous survey. A new type of ceramic fibre muffle furnace can provide a high efficient resolution by rapid moss sample ashing. Furthermore,the ashed sample reduced the previous volume increasingly as the result of saving the limited space of irradiation prothole. The process avoided the contamination of other elements as well. Compared with the element concentrations of the 4 species of Chinese mosses surveyed by Chinese Russianco operation, the element loss can be ignored after the procedure of sample homogeneity by moss ashing.

关 键 词：苔藓 中子活化法 灰化 重金属元素 生物监测 

分 类 号：Q503[生物学—生物化学]