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黄铁矿等硫化物矿物中高含量硫的测定,一般采用硫酸钡重量法,但分析时间长。有人采用氧化铜空气燃烧法,但碘酸钾溶液的滴定度不能按理论值计算,实际工作中采取加校正值的办法计算碘酸钾溶液对硫的滴定度,否则比重量法结果偏低,尤其是对高含量硫的测定。本文提出在低真空系统中,用氧化亚铜作氧化剂,使黄铁矿等硫化物在高温下发生燃烧反应,生成的二氧化硫由吸收液吸收,以含碘化钾的碘酸
Pyrite and other sulfide minerals in the determination of high levels of sulfur, the general barium sulfate gravimetric method, but the analysis of a long time. Some people use copper oxide air combustion method, but the titer of potassium iodate solution can not be calculated according to the theoretical value. In practice, take the method of adding the correction value to calculate the titers of sulfur acid solution of potassium iodate solution, otherwise the specific gravity method results are too low, Especially for the determination of high levels of sulfur. In this paper, we propose that in low vacuum system, cuprous oxide is used as oxidant to make pyrites and other sulfides react at high temperature. The generated sulfur dioxide is absorbed by the absorbing solution,