摘要
使用泡沫塑料富集金，经硫脲解脱，采用斜坡升温模式和热解涂层石墨管，经管壁原子化，分析测定化探样品中的痕量金，讨论不同曲线对测定结果的影响。通过标准回收实验和不同分析方法结果对照及对国家一级标准物质的分析测定，表明该方法具有良好的准确度和精密度，方法检出限为0．1×10^-9，方法回收率在97％-106％之间，精密度（RSD，n=12）为3％～11％，满足1：5万化探样品中痕量金的分析要求。
Trace gold is concentrated with foam plastics, by extrication of sulfur thiourea solution, using the technology of slope-heating and pyrolytic coated graphite tube for measure trace gold by Z-2000 graphite furnace atomic absorption spectrometry（GFAAS） , we discuss the influences of standard curve and working curve on the determination result. By standard recovery experiment, various methods compare and determination of the first class national standard materials, the detection limit of the method is 0.1 x 10 -9, the recovery rate is 96% - 110% and the precision is 3% 11% , which satisfy analysis requirements of trace gold in 1 ： 50 000 geochemical sample.
出处
《黄金科学技术》
2009年第1期53-55,共3页
Gold Science and Technology
关键词
Z-2000石墨炉
原子吸收光谱法
痕量金
泡沫塑料
化探样品
Z-2000 graphite furnace
Atomic absorption spectrometry
Trace gold
Foam plastics
Geochemical samples
