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贵金属精矿(下称精矿)系提取贵金属原料,其中含硫5～40%、锇约0.3%,钌约0.5%以及其它贵金属。燃烧法测定硫虽简便,但精矿中富集了的锇和钌易氧化成四氧化锇和四氧化钌,进入硫吸收液,干扰硫的测定。硫酸钡重量法虽适应这种物料,但流程较长。本文采用四氯化碳—活性炭吸附剂,选择吸附四氧化锇和四氧化钌,用燃烧中和法测定精矿中硫,收到了满意的效果。在所拟条件下0.1克试样经分离后,进入硫吸收液的锇小于2微克,钌小于3微克,不干扰测定。吸附剂对二氧化硫无吸附。因此,可用燃烧
Precious metal concentrate (hereinafter referred to as concentrate) extraction of precious metal raw materials, including sulfur 5 ~ 40%, osmium about 0.3%, about 0.5% ruthenium and other precious metals. Determination of sulfur combustion method is simple, but concentrate enriched osmium and ruthenium easily oxidized to osmium tetroxide and ruthenium tetroxide, into the sulfur absorption solution, interference sulfur determination. Barium sulfate gravimetric method to adapt to this material, but the process is longer. In this paper, carbon tetrachloride - activated carbon adsorbent, the choice of adsorption of osmium tetroxide and ruthenium tetroxide, with the combustion neutralization method for the determination of sulfur in the concentrate, and received satisfactory results. Under the proposed conditions 0.1 g sample after separation, enter the sulfur absorption solution osmium less than 2 micrograms, ruthenium less than 3 micrograms, does not interfere with the determination. Adsorbent does not adsorb sulfur dioxide. Therefore, the available combustion