论文部分内容阅读
在ｐＨ４的ＨＡｃＮａＡｃ介质中，钪与二溴对羧基氯磺酚发生反应，在５ｍｉｎ内完成显色，生成蓝色配合物，吸光度至少稳定２４ｈ，组成比为１∶３，λｍａｘ＝６３８ｎｍ，ε为３７４×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，钪的质量浓度在０～０７２ｍｇ／Ｌ符合比尔定律。试剂对轻稀土有较好的抗干扰能力。所拟方法经国家一级标准物质中钪的测定检验，结果与标准值相符。
In pH4 HAc NaAc media, scandium and dibromocarboxylazosulfate reacted within 5min to complete the color, the blue complex was formed, the absorbance was stable at least 24h, the composition ratio of 1: 3, λmax = 638nm, ε is 374 × 104L · mol-1 · cm-1, and the mass concentration of scandium is 0 ~ 072mg / L, which accords with Beer’s law. Reagents of light rare earth has better anti-interference ability. The proposed method by the national standard test determination of scandium, the results consistent with the standard value.