《黄金》杂志(月刊) 第39卷 总第419期
2018年10月 第10期
目次
分析测试
  • 卑磷酸盐滴定法测定金精矿中的砷……苏广东,陈永红,刘正红,孟宪伟,芦新根,洪博
  • 摘 要:碘量法可测定高砷金精矿样品,但采用的三氧化二砷、亚砷酸钠均为有毒物质,限制了方法的应用。实验对碘量法进行改进,重铬酸钾代替传统卑磷酸盐滴定法中的碘,硫酸亚铁铵代替剧毒物质亚砷酸钠,并对实验条件进行了优化。该方法测定范围为0.15 %15.00 %,测定结果的相对标准偏差为0.72 %6.39 %,准确度为0.17 %2.59 %。经国家标准物质验证,测定值与推荐值基本一致。该方法环境友好,准确度和精密度满足测试要求。

    Determination ofarsenic in gold concentrates by hypophosphite titration……Su Guangdong,ChenYonghong,Liu Zhenghong,Meng XianweiLu Xingen,HongBo

    AbstractIodometry cananalyze gold concentrates samples with high arsenic content,but the As2O3and NaAsO2 are both toxic chemicals,limiting the application of themethod.The experiment modified the iodometry,replacing I2 by K2Cr2O7in conventional hypophosphite titration,and the highly toxic NaAsO2by (NH4)2SO4·FeSO4·6H2O,and the experimental conditions were optimized.Thedetermination range is 0.15 %-15.00 %.The RSD of the results is 0.72 %-6.39%.The accuracy is 0.17 %-2.59 %.The method was verified by the nationalstandard samples,and the measured value was basically the same as the referencevalue.The method is environmentally friendly,the accuracy and precision meetthe analysis requirement.

    Keywords:titration;gold concentrates; As; K2Cr2O7; (NH4)2SO4·FeSO4·6H2O;sample weight

  • 关键词:滴定法;金精矿;砷;重铬酸钾;硫酸亚铁铵;称样量
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