悬浮体制样石墨炉原子吸收光谱法直接测定琥珀中微量镉  

Slurry Sampling for Direct Determination of Trace Cadmium in Amber by Graphite Furnace Atomic Absorption Spectrometry

作　　者：陈世忠[1] 陆登波[1] 

机构地区：[1]武汉工业学院重点实验室,湖北武汉430023

出　　处：《光谱学与光谱分析》2006年第10期1928-1930,共3页Spectroscopy and Spectral Analysis

基　　金：湖北省自然科学基金(2005ABA025)资助项目

摘　　要：报道了以硝酸钯为基体改进剂,采用悬浮体制样石墨炉原子吸收光谱法直接测定琥珀中微量Cd的方法。研究了悬浮剂、试样粒度、基体改进剂、灰化/原子化温度和共存金属离子对分析信号的影响。在优化实验条件下,方法的检出限为9.4 ng.g-1,相对标准偏差(RSD)为6.1%。A method for the direct determination （GFAAS） with slurry sampling was described. of trace cadmium in amber by graphite furnace atomic absorption spectrometry Palladium nitrate was used as a matrix modifier to eliminate the interference. Slurry stability and the influences of the matrix modifier, ashing/atomization temperature and coexistent ions on analytical signals were investigated in detail. Under the optimized experimental conditions, the detection limit of this method was 9.4 ng·g^-1 with a precision of 6.1%.

关 键 词：石墨炉原子吸收光谱法 悬浮体制样 琥珀 硝酸钯 镉 

分 类 号：O657.3[理学—分析化学]