【摘要】 研究了三溴偶氮胂光度法测定稀土精矿中铈组稀土元素。实验选择了最大吸收波长为640nm,显色酸度为0.24mol/L~1.44mol/L盐酸,当稀土的浓度在0μg/mL~1.6μg/mL范围内符合比尔定律,考察了共存元素的干扰情况。方法回收率在100.8%~101.6%之间,相对标准偏差RSD<2%。更多还原

【Abstract】 In this paper,we have studied determination of the cerium-group rare earth elements in rare earth concentrate by spectrophotometry with tribromocarboxy arsenaxo.Maximum absorption wavelength was elected,as 640nm.The chromogrnic acidity of hydrochloric acid is 0.24 mol/L~1.44 mol/L.Beer’s law is obeyed in the range of 0 μg/mL~1.6 μg/mL of rare earth concentration.We have also investigated the influence of coexistent elements.Recovery of the method is 100.8%~101.6%,RSD<2%.更多还原