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Cr(Ⅲ)-5-Br-PADAP-DEA多元配合物分析应用及结构研究
Study on Application and Composition of Multiligand Complex of Cr(Ⅲ)-5-Br-PADAP-DEA
【摘要】 :采用二次回归正交设计法系统地研究了 Cr ( Ⅲ) —5 - Br - P A D A P— D E A 三元配合物显色反应的最佳条件,建立了测定 Cr ( Ⅲ) 的新方法,ε595max = 5 .7 ×104 L·mol- 1·cm - 1 。将该方法用于合成水样和40 号铬钒钢中铬含量的测定,结果令人满意。并通过紫外—可见及红外光谱对该配合物的分子结构进行了研究,推断出该三元配合物的配位情况
【Abstract】 The optimum colour conditions of the complex of Cr(Ⅲ)-5-Br-PADAP-DEA have been studied in quadratic regression orthogonal design. The new method is successfully utilized for the determination of chromium in wastewaters and alloy steels. The maximum absorption of the complex is found at 595nm and molar absorptivity is calculated to be 5.7×10 +4 .Beer’s law is obeyed in the range of 0~20ug/25ml for Cr(Ⅲ).Its composition has been confirmed by UV-UIS and IR.
【关键词】 配合物;
铬;
5-Br-PADAP;
DEA;
吸光光度法;
二次回归;
正交设计;
光谱;
【Key words】 complex; chrominum; 5-Br-PADAP; spectrophotometry; quadratic regression orthogonal design; spectrum;
【Key words】 complex; chrominum; 5-Br-PADAP; spectrophotometry; quadratic regression orthogonal design; spectrum;
【基金】 安徽大学董事会青年资金项目
- 【文献出处】 安徽大学学报(自然科学版) ,JOURNAL OF ANHUI UNIVERSITY(NATURAL SCIENCES) , 编辑部邮箱 ,1999年03期
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