摘要
介绍了低灰分活性炭吸附10%～30%王水溶液中的金,灰化后,王水溶解,采用美国热电原装涂层石墨管测定岩石样品中痕量金。研究了测定时酸度、介质及石墨炉的灰化温度、原子化温度对测定的影响。该方法的检出限达到0.04×10-9,精密度(RSD,n=12)为4%～7%;经国家一级标准物质分析验证,结果与标准值相符。
The Au dissolved in chloroazotic acid (the concentration of which is 10%～30%) is absorbed using low ash content activated carbon,and the carbon is ashed and dissolved again in chloroazotic acid.Then the trace gold in rock samples can be determined with coated graphite pipe made in US.The effects of acidity,media,ashing temperature and atomization temperature on determination are studied.The DL of the method can be up to 0.04×10 -9,and RSD(n=12) is in the range of 4%～7%.The result is coincident with the value of national absolute standard substance.
出处
《黄金》
CAS
北大核心
2005年第5期42-44,共3页
Gold
基金
国土资源大调查工作项目<铂钯金活动态分析方法研究>(200220190010)
国家重点基础研究课题(G1999043212)经费资助
关键词
石墨炉原子吸收
痕量金
涂层石墨管
graphite oven atomic absorption
trace gold
coated graphite pipe
