3，5－二溴－4－氨基苯基荧光酮的离解及与钼显色反应的研究

3，5－二溴－4－氨基苯基荧光酮的离解及与钼显色反应的研究 STUDY ON DISSOCIATION OF 3, 5-DIBROMO-4-AMINOPHENYLFLUORONE AND ITS COLOR REACTION WITH MOLYBDENUM 黄应平 1 first-author 张华山 1 李清香 1 黎心懿 1 武汉大学化学系 武汉大学化学系 Department of Chemistry, Wuhan University Department of Chemistry, Wuhan University 用分光光度法研究了２，３，７－三羟基－９－（３，５－二溴－４－氨基）苯基荧光酮的离解平衡和离解常数；以其为显色剂，进行了钼（ＶＩ）的分光光度法研究，在０．２～０．８ｍｏｌ·Ｌ－１ＨＣｌ溶液中，ＣＴＭＡＢ存在下，显色剂与Ｍｏ（ＶＩ）生成灵敏的红色三元配合物，ε５３０＝１．５６×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，用于测定钢中的钼，结果满意． The dissociation of 2, 3, 7, -trihydroxy-9- （3, 5-dibromo-4-amino） phenylfluorone （DBAPF）in aqueous solution have been studies and the dlssociation constants of DBAPF has been determined. At the same time, a color reaction of Mo （Ⅵ） with DBAPF and CTMAB has been researched. The highly sensitive color ternary complex is formed in 0. 2～0. 8 mol· L-1 H solution. The maximum absorption is at 530nm. The molar absorptivity coefficient equals 1. 56 × 105 L-·mol -1· cm-1. The spectrophotometric method has been applied to the determination of molybdenum in steel and alloys with satlsfactary results. 2 3 7－三羟基－9－(3 5－二溴－4－氨基)苯基荧光酮 分光光度法 钼 离解常数 O625.635 国家自然科学基金(61672102) 1995-06-01 2021-04-01 6