铋（Ⅲ）─4，5－二溴苯基荧光酮－溴化十六烷基三甲铵高灵敏显色反应的研究  

Study on High Sensitlve Colour Reaction of Bismuth（Ⅱ）─4，5-Dibromophenylfluo-rone-CTMAB System

作　　者：王慧敏[1] 王东进[1] 谢增鸿[1] 谢金海[1] 

机构地区：[1]福州大学化学系,福州抗生素总厂

出　　处：《冶金分析》1994年第5期1-4,共4页Metallurgical Analysis

摘　　要：本文研究了铋（Ⅲ）－４，５－二溴苯基荧光酮（ＤＢＰＦ）－绩化十六烷基三甲铁（ＣＴＭＡＢ）体系的显色及其应用。结果表明，在ｐＨ４．０～６．０形成了稳定的摩尔比Ｂｉ（Ⅲ）：ＤＢＰＦ：ＣＴＭＡＢ＝１∶３∶６的三元配合物，其表现摩尔吸光系数为３．３４×１０￣５．铋浓度在０～５．０μｇ／１０ｍｌ范围内服从比尔定律。经沉淀分离和巯基棉分离，已测定了多种铜合金中的痕量铋，得到了满意的结果。A highly sensitive colonr reaction of bismuth（Ⅲ）with 4，5-dibromophenylfluorone（DBPF）and cetyltrimethylammonium bromide（CTMAB）has been studied．It shows that bismuth（Ⅲ）forms a ternary complex with the above reagents at pH4．0-6．0 by heaing at 75℃ for 10 min.The molar absorptivity of the complex is 3． 34× 10~5L· mol^(-1)·cm^(-1) at 585nm.The complex is stable for at least 18h．The molar ratio of Bi／DBFF／CTNAB is 1∶3∶6．Beer＇s law is obeyed in the range of 0-5，0μg／10ml for Bi（Ⅲ）．After separation with suIfhylated cotton，the method has been uscd for the determination of trace amount bismuth in copper base alloy with satisfactory results.

关 键 词：铋 二溴苯基荧酮 分光光度法 

分 类 号：TG115.335[金属学及工艺—物理冶金]