摘要
研究金属铅及氧化铅中痕量金的ICP-MS测定方法。通过向金属铅试样中加入适量的银,直接在850～900℃进行灰吹,使金与铅及杂质分离并富集,对于氧化铅采用造渣制成铅扣再灰吹的方法,实现金与铅及杂质的分离。合金颗粒用王水溶解,溶液用ICP-MS方法测定。测定方法可准确测定金属铅及氧化铅样品中10^(-9)级的金。样品加标回收率在98％～102％之间。
A method for determination of trace gold in lead oxide and lead metal by inductively coupled plasma mass spectrometer is developed. The gold in the lead metal is separated from the lead matrix and other impurities and concentrated by adding silver melting and cupelling at 850 - 900℃, similarly the gold in the lead oxide is separated and concentrated by smelting and lead button cupelling process. The alloy particle from the cupelling process is dissolved with aqua regia, and the test solution is determined by inductively coupled plasma mass spectrometer. The gold content above 10-9 in lead metal and lead oxide can be accurately determined by this method. The recoveries of standard addition for gold are 98% -102% .
出处
《有色金属》
CSCD
2003年第4期163-165,共3页
Nonferrous Metals
关键词
铅
氧化铅
ICP-MS
测定
金
等离子体质谱
analytical chemistry
gold determination
inductively coupled plasma mass spectrometer
lead metal
lead oxide
