微乳液-二溴对甲偶氮羧分光光度法测定微量锑  

Spectrophotometric Determination of Microamounts of Antimony with Dibromo-p-methyl Carboxyazo in Microemulsoid

作　　者：徐国想[1] 马卫兴[1] 许兴友[1] 洪晴[1] 

机构地区：[1]淮海工学院化学工程系,连云港222005

出　　处：《理化检验（化学分册）》2008年第8期734-735,739,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：江苏省高校自然科学研究项目(03KJD150014);江苏省海洋生物技术重点建设实验室基金项目(2006HS020)

摘　　要：试验发现在pH 10.4的氨性缓冲溶液中,锑(Ⅲ)与二溴对甲偶氮羧(DBpMCA)及乳化剂CTMAB形成稳定的红色三元络合物,其吸收峰位于550 nm波长处,其摩尔吸光率为1.0×105L.mol-1.cm-1。其质量浓度在8.0μg/10 mL以内符合比耳定律。测得此络合物的组成摩尔比为锑(Ⅲ)∶DBpMCA∶CTMAB=1∶3∶2。It was found that in an arnmoniacal buffer medium of pH 10. 4, a stable reddish colored ternary complex was formed among Sb（ Ⅲ ）, dibromo-p-methyl carboxyazo （DBpMCA） and emulsifier CTMAB, with its absorption maximum at 550 nm and its molar absorptivity of 1.0×105L·mol^-1·cm^-1. Beer＇s law was obeyed in the range within 8. 0ug per 10 mL of solution. The mole ratio of the complex was found to be： Sb（Ⅲ） ： DBpMCA ： CTMAB= 1 ： 3 ： 2.

关 键 词：分光光度法 锑(Ⅲ) 二溴对甲偶氮羧 乳化剂CTMAB 

分 类 号：O657.31[理学—分析化学]