化学学报 ›› 1987, Vol. 45 ›› Issue (6): 579-583. 上一篇    下一篇

研究论文

贵金属元素电化学分析研究VI.黄原酸钠纤维素酯富集,分离锇,钌样品中的银及其阳极溶出伏安法测定

张玉祥;王志勇;孙元喜;张至德   

  1. 兰州大学化学系;湖南常德师专;贵州省冶金设计研究院
  • 发布日期:1987-06-15

Studies on electrochemical analysis of precious metal elements VI.CCX enrichment and separation of silver from bulk osmium and ruthenium and determination by ASV

ZHANG YUXIANG;WANG ZHIYONG;SUN YUANXI;ZHANG ZHIDE   

  • Published:1987-06-15

关键词: 钠化合物, 银, 阳极溶出伏安法, 富集, 钌, 电化学分析, 贵金属, 黄原酸盐, 锇, 纤维素酯

Cellulose xanthate cotton was used for enrichment and separation of Ag from bulk Os and Ru from 0.65 mol HNO3/L solution The adsorbed Ag was eluted with 8-10 4M HNO3. Submicrogram quantity of Ag can be enriched and separated from the cotton with a recovery of 98%. Trace Ag was determine on glass carbon electrode by anodic stripping voltammetry in the electrolytic system of 0.1 mol KSCN/L-0.2 mol HNO3/L-2.5 mol CyDTA/L. The linear range between the concentration and the peak current of Ag is 10-11 to 10-7 g/mL. The detection limit reaches 10 parts per trillion for 10 min electrolysis. The relative standard deviation is 4.2% for Os sample with 6 replicate detns. The results agree with those obtained by atomic absorption spectrometry.

Key words: SODIUM COMPOUNDS, SILVER, ANODIC-STRIPPING VOLTAMMETRID METHOD, CONCENTRATION, RUTHENIUM, ELECTROCHEMICAL ANALYSIS, PRECIOUS METALS, XANTHOGENATE, OSMIUM, CELLULOSE ESTERS

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