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本文研究了用玫瑰红银试剂吸附共沉淀富集,原子吸收光谱法测定矿石中的微量银.在2%的硝酸介质中,试剂产生的沉淀吸附它与银生成络合物,0.25—3微克银从50毫升溶液中迅速得以富集,回收率达95%以上.沉淀溶解于丙酮中,在微量盐酸存在下,用空气—乙炔火焰原子吸收测定银,其灵敏度为普通水溶液中三倍以上.经MGI金银标样及GSD水系沉积物标样检验,所得结果与原结果吻合,变动系数为6%.本法可用于0.05g/t以上矿石中银的测定.
In this paper, the use of rose red silver reagent co-precipitation enrichment, atomic absorption spectrometry for the determination of trace silver in ore in 2% nitric acid medium, the precipitate generated by the reagent adsorbed silver complex with it, 0.25-3 micrograms The silver was quickly enriched from 50 ml of the solution and the recovery was over 95%. The precipitate was dissolved in acetone and the silver was detected by air-acetylene flame atomic absorption spectrometry in the presence of trace amounts of hydrochloric acid with a sensitivity of more than three times that of normal aqueous solutions. The results of MGI gold and silver standard samples and GSD water sediment samples were consistent with the original results and the coefficient of variation was 6% .This method can be used for the determination of silver in ore above 0.05g / t.