论文部分内容阅读
2(5-溴-2-吡啶偶氮)-二乙氨基酚(5-Br-PADAP)已广泛用作多种金属离子的萃取光度法分析的研究与应用。我们在对钴(Ⅱ)、镉(Ⅱ)与该试剂及OP体系的增溶效果的条件研究及应用的基础上,对铜(Ⅱ)-5-Br-PADAP-OP体系的反应条件进行了研究与应用。结果证明,在碱性环境,玫瑰红色的Cu(Ⅱ)-5-Br-PADAP络合物瞬间即形成,络合物的最大吸收在530mm,络合物组成为铜(Ⅱ):试剂=1:2,摩尔吸光系数为1.5×10~5升·摩尔~(-1)·厘米~(-1);铜(Ⅱ)含量在0～16微克/25毫升服从比尔定体。
2 (5-Bromo-2-pyridylazo) -diethyl aminophenol (5-Br-PADAP) has been widely used for the study and application of the extraction spectrophotometric analysis of a variety of metal ions. Based on the research and application of the solubilization effect of cobalt (Ⅱ), cadmium (Ⅱ) and this reagent and OP system, the reaction conditions of copper (Ⅱ) -5-Br-PADAP-OP system were studied Research and Application. The results show that in alkaline environment, rose red Cu (Ⅱ) -5-Br-PADAP complex instantly formed, the maximum absorption of the complex at 530mm, the complex composition of copper (Ⅱ): reagent = 1 : 2, the molar absorptivity is 1.5 × 10-5 mol · cm -1; copper (Ⅱ) content is in the range of 0-16 μg / 25 ml.