CAJ | 학술논문

影响特高品位矿石中Au、Ag准确测定的因素主要有AgCl、PbCl2沉淀和Au、Ag矿物的硅酸盐包裹体，W、Mo、Sb和Pb等竞争吸附，容量分析的滴定终点干扰，以及待测溶液的介质及浓度等。研究确定了HCl-HNO3-KClO3（-NH4 HF2）和（ NH2）2 CS封闭溶样，泡沫塑料分段富集（或活性炭富集），AAS法硫脲介质测定矿石中的Au、Ag。该方法可有效避免各影响因素干扰，且操作简便、不污染环境，分析结果的精密度（ RSD ）为0．66％～0．93％，国家标准样品加标回收率为98％～102％。
영향특고품위광석중Au、Ag준학측정적인소주요유AgCl、PbCl2침정화Au、Ag광물적규산염포과체，W、Mo、Sb화Pb등경쟁흡부，용량분석적적정종점간우，이급대측용액적개질급농도등。연구학정료HCl-HNO3-KClO3（-NH4 HF2）화（ NH2）2 CS봉폐용양，포말소료분단부집（혹활성탄부집），AAS법류뇨개질측정광석중적Au、Ag。해방법가유효피면각영향인소간우，차조작간편、불오염배경，분석결과적정밀도（ RSD ）위0．66％～0．93％，국가표준양품가표회수솔위98％～102％。
Factors that affect the determination of Au and Ag in ultra high grade ores include the precipitation of AgCl and PbCl2,silicate inclusions of Au and Ag,competitive adsorption of W,Mo,Sb and Pb,and the media and con-centration of the solution to be tested .Au and Ag determination by the HCl-HNO3-KClO3 (-NH4 HF2 ) and ( NH2 ) 2 CS sealed dissolution -AAS method in thiourea media can effectively avoid all kinds of interference and is easy to operate and not pollutant to the environment .The RSD is 0.66%to 0.93%and the national standard material recovery rate is 98 %to 102 %.