石墨探针直接收集、石墨探针炉原子吸收法测定APM中痕量银  

DIRECT COLLECTION WITH GRAPHITE PROBE FILTERS AND DETERMINATION OF TRACE SILVER IN ATMOSPHERIC PARTICULATE MATTER BY GRAPHITE PROBE FURNACE ATOMIC ABSORPTION SPECTROMETRY

作　　者：葛伊莉[1] 张必成[1] 蔡火操[1] 周立群[2] 

机构地区：[1]湖北大学化学系,武汉430062 [2]湖北大学实验中心,武汉430062

出　　处：《环境化学》1998年第2期191-194,共4页Environmental Chemistry

摘　　要：本文采用一定气孔性的石墨探针直接收集大气颗粒物（APM）,然后用石墨探针炉原子吸收法直接测定收集在探针上的APM中痕量银。实验表明:峰面积吸光度与银的浓度在0—120ng·ml^(-1)范围内呈线性关系,银的特征量为6.75pg,检测限（3σ）为11.74pg,RSD（n=11）为3.92％,分析标准物质NBS1648（城市颗粒物）,其回收率和RSD（n=5）分别为90.2—105.0％和6.0％,证明此法准确、灵敏、快速、简便。A novel analytical method for direct determination of trace silver in atmospheric particulate matter by graphite probe furnace atomic absorption spectrometry after the collection with graphite probe filters has been investigated in this paper. The results showed that the absorbance (peak-area mode)and the concentration of silver had a linear relation in the range of 0-120 ng·ml-1 according to this method. The characteristic mass of silver was 6.75 pg and the detection limit(3σ)was 11.74 pg. Its relative standard deviation was 3. 92%. The results of analysis of the National Bureau of Standard of America, Standard Reference Material (SRM)No. 1648, Urban Particulate Matter, gave a recovery of 90. 2-105. 0% and a precision of 6. 0% RSD. The method proved to be accurate,sensitive, simple and rapid.

关 键 词：石墨探针 原子吸收法 颗粒物 大气污染 大气监测 

分 类 号：X831.02[环境科学与工程—环境工程]