火焰原子吸收光谱法测定高炉尘中铟

来源期刊：冶金分析2011年第6期

论文作者：吕佳 王光明 李辽沙

文章页码：22 - 25

关键词：铟； 分离富集； 火焰原子吸收光谱法； 高炉尘

Key words：indium； separation and enrichment； flame atomic absorption spectrometry； blast furnace dust

摘    要：采用混合酸溶样,过量氢氧化钠溶解氢氧化铟分离富集高炉尘中痕量铟,火焰原子吸收光谱法测定样品中铟含量,建立了一种测定复杂体系中痕量铟的简便方法。对实验过程中的酸用量、不同碱液及碱用量对溶解及测定结果的影响、共存离子的干扰等情况进行了考察,确定了最佳实验条件。实验结果表明,氢氧化钠能够有效的溶解痕量氢氧化铟,同时沉淀了铁、镁等离子,去除了高炉尘中大部分的干扰元素。方法相对标准偏差小于4.2%,回收率在98%~103%之间。

Abstract: After the sample was dissolved with mixed acid,excessive sodium hydroxide was added to dissolve indium hydroxide for separation and enrichment of trace indium in blast furnace dust.Then,the content of indium in sample was determined by flame atomic absorption spectrometry.Consequently,a simple determination method of trace indium in complex system was established.The influence factors on the dissolution and determination results were investigated including the dosages of acid,various alkaline liquors and the dosage of alkali.Moreover,the interference of coexisting ions was studied.Finally,the optimal experimental conditions were obtained.The results showed that sodium hydroxide could effectively dissolve trace indium hydroxide.Meanwhile,the ions of iron and magnesium were precipitated,removing most interference elements in blast furnace dust.The relative standard deviation (RSD) of this method was less than 4.2%,and the recoveries were 98%-103%.