Spectrophotometric Determination of Microamounts of Antimony with Dibromo-p-methyl Carboxyazo in Microemulsoid
Hong Qing
Abstract
Hong Qing
Abstract
It was found that in an ammoniacal 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 8.0 μg per 10 mL of solution.The mole ratio of the complex was found to be: Sb(Ⅲ)∶DBpMCA∶CTMAB=1∶3∶2.
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It was found that in an ammoniacal 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 8.0 μg per 10 mL of solution.The mole ratio of the complex was found to be: Sb(Ⅲ)∶DBpMCA∶CTMAB=1∶3∶2.
Key concepts: Molar absorptivity, Antimony, Chemistry, Molar ratio, Ternary operation, Absorption (acoustics), Spectrophotometry, Ternary complex