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在pH 5 0的茜素S KCl HAc NaAc La3+溶液中 ,Ga(Ⅲ )、In(Ⅲ )具有良好的示波图 ,其切口电位为 - 1 38V和 - 0 86V(vs SCE) ,可分别进行测定。镓的质量浓度在 1 0 0～ 1 80 0 μg/L内、铟的质量浓度在 5～ 1 40 μg/L内与切口高度呈良好的线性关系 ,检出限Ga为 90 μg/L及In为5μg/L。通过萃取与干扰元素分离之后 ,对闪锌矿、锡石样品中的镓、铟测定 ,8次测定的RSD分别为 5 3%和 6 5% ,加标回收试验的回收率Ga为 96 1 6% ,In为 97 2 2 %。
Ga (Ⅲ) and In (Ⅲ) have good oscillograms with a cut potential of -138V and -086V (vs SCE) in the solution of alizarin S KCl HAc NaAc La3 + Determination. The mass concentration of gallium was in the range of 1 0 0 ~ 1 80 0 μg / L, the concentration of indium was in a range of 5 ~ 1 40 μg / L with a good linear relationship with the height of the incision, the detection limit Ga was 90 μg / L and In 5 μg / L. After separation from the interfering elements by extraction, the RSDs of gallium and indium in the sphalerite and cassiterite samples were 53% and 65%, respectively, and the recoveries Ga in the spiked recovery test were 96 1 6 %, In is 97 2 2%.