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

Hong Qing

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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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What this paper is about

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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Available 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.

Key concepts: Molar absorptivity, Antimony, Chemistry, Molar ratio, Ternary operation, Absorption (acoustics), Spectrophotometry, Ternary complex

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