摘要
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.
出处
《武汉大学学报（自然科学版）》
CSCD
1995年第6期672-676,共5页
Journal of Wuhan University(Natural Science Edition)
基金
国家自然科学基金
关键词
苯基荧光酮
分光光度法
钼
离解常数
DBAPF
trihydroxy-9- (3, 5-dibromo-4-amino) phenyl-fluorone, spectrophotometry, molybdenum, dissociation
