【摘要】 报道了一个改进的铅试金分离富集-ICP-AES测定含银物料中铑的方法。用钯粉或钯银粉混合物作灰吹保护剂,分别研究了钯与银的质量比、合粒中钯银与铑的质量比对分离富集含银物料中铑的影响。结果表明:当钯量:银量≥2:1时,铑在灰吹过程的损失可忽略;当钯银量:铑量≥40:1时合粒中铑在常压下可以完全溶解;当银量:钯量≥1:10时,合粒可以用HNO3(1+3)快速溶解。研究了钯量对电感耦合等离子体发射光谱法测定铑的影响。方法回收率98.2%～100.5%,对实际样品进行分析,测定值与推荐值一致,相对标准偏差小于4.0%(n=5)。更多还原

【Abstract】 An improvement was made on the separation and enrichment of rhodium by lead fire assay with ICP-AES method.Using palladium powder or a mixture of palladium silver as protective reagent for cupellation,the effects of various testing factors,such as the mass ratio of palladium to silver and the mass ratio of palladium-silver to rhodium,have been studied in detail when rhodium was enriched.The results indicated that loss of rhodium could be ignored for cupellation process at Rh:Pd≥2:1,rhodium of kernel could be completely dissolved at atmospheric pressure and Pd-Ag:Rh≥40:1,kernel of precious metals could be dissolved with HNO3(1 +3) at Ag:Pd≥1:10.The effects of palladium on the determination of rhodium with inductively coupled plasma atomic emission spectrometry had been studied.The recoveries of silver in samples ranged from 98.2% to 100.5%.Found values were consistent with recommended values,and the relative standard derivations(RSDs) were less than 4.0 %(n=5) in the real samples.更多还原