火焰原子吸收法测定锌冶炼渣中的痕量铟
李颜君
西部矿业集团科技发展有限公司,西宁 810007
Determination of trace indium in zinc smelting slag by flame atomic absorption spectrometry
李颜君
Westmining Technology Development Co., Ltd., Xining 810007, China
摘要:建立空气-乙炔火焰原子吸收测定锌冶炼渣中铟的方法。采用硝酸-盐酸-氢溴酸-氢氟酸-高氯酸溶解样品,以少量氢氟酸除硅,以氢溴酸、高氯酸去除干扰元素锑、铋、砷、锡等,在10%硝酸介质中直接测定铟。铟的质量浓度在0.01~10 μg/mL范围内与吸光度呈良好的线性关系,线性相关系数为0.999 4,方法检出限为0.001 μg/mL。测定结果的相对标准偏差为0.037%~0.067%(n=6),加标回收率为96%~106%。该方法测定结果与电感耦和等离子体发射光谱法测定结果基本一致。该方法样品处理简单,测定结果准确可靠,适用于锌冶炼过程中酸洗渣、镍钴渣、富铟渣、氧化锌浸出铅渣、尾矿渣、中和渣中铟的测定。
Abstract:The method for determination of indium in zinc slag by air-acetylene flame atomic absorption spectrometry was established. Sample was dissolved by using nitric acid-hydrochloric acid-hydrobromic acid-hydrofluoric acid-perchloric acid. Silicon was removed with a small amount of hydrofluoric acid, interference element of antimony, bismuth, arsenic, tin and other elements was removed with hydrobromic acid, perchloric acid, and indium was directly determined in the 10% nitrate medium. The mass concentration of indium had good linear relationship with the absorbance in the range of 0.01-10 μg/mL, the correlation coefficient was 0.999 4, and the detection limit of the method was 0.001 μg/mL. The relative standard deviation of determination results was 0.037%-0.067%(n=6), and the recovery of standard addtion was 96%-106%. The determination result of this method was consistent with that of inductive coupling and plasma emission spectrometry. The method is simple, accurate and reliable, and it is suitable for determination of indium in acid washing slag, nickel and cobalt slag, indium rich slag, zinc oxide leaching lead slag, tailings slag and neutralizing slag in zinc smelting process.
关键词:火焰原子吸收光谱法;锌冶炼渣;铟
Keywords:flame atomic absorption spectrometry; zinc smelting slag; indium
本文引用格式:
李颜君.火焰原子吸收法测定锌冶炼渣中的痕量铟[J].化学分析计量,2019,28(5):65-67,75. LI Y J. Determination of trace indium in zinc smelting slag by flame atomic absorption spectrometry[J]. Chemical analysis and meterage,2019,28(5):65-67,75.
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