摘要
试样经灼烧,用王水加热分解,并在Fe3+存在下,于王水介质中用泡沫塑料吸附Au;吸附Au后的泡沫塑料再用10 g/L硫脲溶液解脱,采用斜坡升温技术在220ZS石墨炉原子吸收光谱仪测定超痕量金.根据实验得出最佳分析条件,该方法检出限为0.1 ng/g,精密度(RSD,n=12)4.2%～10.8%,经国家一级标准物质分析验证,结果与标准值相符.
The geochemical exploration sample was roasted and dissolved with aqua regia. The trace gold is absorbed by polyurethane foam from aqua regia medium under the presence of Fe^3＋ and released in 10 g/L thiourea solution. The trace gold is determined by GFAAS with the slope warming. The detection limit of the method is 0.1ng/g with the precision （RSD, n=12） of 4.2 %-10.8 %. The results conform to the certified values national standard reference material tests. through the
出处
《有色金属科学与工程》
CAS
2011年第6期89-92,共4页
Nonferrous Metals Science and Engineering
