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本文研究了稀土元素与磺胺偶氮氯膦成络反应的规律性。发现在草酸—盐酸体系中,铈组稀土元素的磺胺偶氮氯膦络合物的稳定性基本一致,其摩尔吸光系数在(8.21～8.66)×10~4升·摩尔~(-1)·厘米~(-1)之间。对铈的磺胺偶氮氯膦络合物的显色条件进行试验后,拟定了磺胺偶氮氯膦直接光度测定铝合金中以铈组稀土为主的稀土总量分析方法。本法准确度、精密度良好,操作简便,经用合成样品验证及实样分析后,结果令人满意。
In this paper, the regularity of rare earth elements and sulforamidochlorophosphine phosphine complexation reaction was studied. The results showed that the stability of sulforamidochlorophosphine complexes of rare earth elements in cerium group was almost the same in the oxalic acid-hydrochloric acid system and the molar absorptivity was in the range of (8.21-8.66) × 10-4 mol · (-1) · mol Cm ~ (-1) between. After the test conditions for the color development of the sulfanilazophosphonaphthalene complex of cerium were established, the total amount of rare earths in the cerium group rare earths in the sulfoamidochlorophosphine phosphine direct photometric determination aluminum alloy was determined. The accuracy of the law, good precision, easy to operate, the use of synthetic samples verified and real sample analysis, the results are satisfactory.