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.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
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)
