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1984•Bulletin of the Chemical Society of JapanRequires access

Solvent-extraction Behavior of Molybdenum(VI) with 1,5-Diphenylcarbazone and the Extraction-spectrophotometric Determination of Molybdenum(VI)

Kousaburo Ohashi, Kiichiro Nagashima, Rumiko Seita, Katsumi Yamamoto

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Abstract

Abstract The solvent extraction of molybdenum(VI) with 1,5-diphenylcarbazone (Hdpco) into chloroform, benzene, or tributyl phosphate (tbp) was studied. The molar ratio of molybdenum(VI): 1,5-diphenylcarbazone in the complex extracted into chloroform or benzene in the range from 1.0 mol dm−3 HNO3 to pH 1.9 was found to be 1:2. The extracted complex was estimated to be MoO2(dpco)2. On the other hand, molybdenum(VI) may be extracted into tbp as a mixture of MoO2(dpco)2 and MoO2(dpco)(OH)(tbp). The extraction constants, Kex(=[MoO2(dpco)2]o/[Mo(OH)6][Hdpco]o2), were determined to be 7.9×106 and 3.8×108mol−2dm6 for chloroform and benzene respectively. A black complex formulated as MoO2(dpco)2·5H2O was formed. Molybdenum(VI) can be determined over the range from 1.50 to 19.0 μg/10 cm3 within a relative error of ±4%. The interference of diverse ions will be described.

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Abstract The solvent extraction of molybdenum(VI) with 1,5-diphenylcarbazone (Hdpco) into chloroform, benzene, or tributyl phosphate (tbp) was studied. The molar ratio of molybdenum(VI): 1,5-diphenylcarbazone in the complex extracted into chloroform or benzene in the range from 1.0 mol dm−3 HNO3 to pH 1.9 was found to be 1:2. The extracted complex was estimated to be MoO2(dpco)2. On the other hand, molybdenum(VI) may be extracted into tbp as a mixture of MoO2(dpco)2 and MoO2(dpco)(OH)(tbp). The extraction constants, Kex(=[MoO2(dpco)2]o/[Mo(OH)6][Hdpco]o2), were determined to be 7.9×106 and 3.8×108mol−2dm6 for chloroform and benzene respectively. A black complex formulated as MoO2(dpco)2·5H2O was formed. Molybdenum(VI) can be determined over the range from 1.50 to 19.0 μg/10 cm3 within a relative error of ±4%. The interference of diverse ions will be described.

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Available abstract

Abstract The solvent extraction of molybdenum(VI) with 1,5-diphenylcarbazone (Hdpco) into chloroform, benzene, or tributyl phosphate (tbp) was studied. The molar ratio of molybdenum(VI): 1,5-diphenylcarbazone in the complex extracted into chloroform or benzene in the range from 1.0 mol dm−3 HNO3 to pH 1.9 was found to be 1:2. The extracted complex was estimated to be MoO2(dpco)2. On the other hand, molybdenum(VI) may be extracted into tbp as a mixture of MoO2(dpco)2 and MoO2(dpco)(OH)(tbp). The extraction constants, Kex(=[MoO2(dpco)2]o/[Mo(OH)6][Hdpco]o2), were determined to be 7.9×106 and 3.8×108mol−2dm6 for chloroform and benzene respectively. A black complex formulated as MoO2(dpco)2·5H2O was formed. Molybdenum(VI) can be determined over the range from 1.50 to 19.0 μg/10 cm3 within a relative error of ±4%. The interference of diverse ions will be described.

Key concepts: Chemistry, Molybdenum, Extraction (chemistry), Solvent extraction, Solvent, Inorganic chemistry, Chromatography, Organic chemistry

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Solvent-extraction Behavior of Molybdenum(VI) with 1,5-Diphenylcarbazone and the Extraction-spectrophotometric Determination of Molybdenum(VI) — Research Paper | ScholarLens