湿法分解-活性炭富集-化学光谱法测定化探样中的金、铂和钯

Wet-Digestion-Activated Carbon Collection-Spectrochemical Determination of Gold,Platinum and Palladium in Mine

试验了用王水溶矿,尿素还原除去NO2-的影响,活性炭吸附Au、Pt、Pd的条件。在10%HCl介质中[AuCl4]-、[PtCl6]2-、[PdCl4]2-被定量吸附,与其他元素分离,经发射光谱法测定。Au、Pt、Pd的回收率为92%—110%,经国家一级标准物质验证,其测定值与标准值相吻合,方法检出限分别为Au0.2ng/g、Pt0.5ng/g、Pd0.3ng/g、精密度为RSD%=7.6—12.8。

The mine samples were digested by aqua regia and removing NO2^- by urea reduction. In 10% HC; solution [AuCl4]^-、[PtCl6]^2- and [PdCl4]^2- were carbon for the separation with other elements and determined qu by antitatively adsorbed in active the emission spectrum. The recoveries for Au,Pt and Pd are in the range of 92%-110%. Through the verification of the state first grade standard material, the degree of accuracy is very good and determinate limitation of this method is separately Au 0.2ng/g,Pt 0. 5ng/g and Pd 0. 3ng/g with the RSD% =7.6-12.8