Solvent-extraction behavior of molybdenum(VI) with 1,5-diphenylcarbazone and the extraction-spectrophotometric determination of molybdenum(VI).
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概要
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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<SUP>−3</SUP> HNO<SUB>3</SUB> to pH 1.9 was found to be 1:2. The extracted complex was estimated to be MoO<SUB>2</SUB>(dpco)<SUB>2</SUB>. On the other hand, molybdenum(VI) may be extracted into tbp as a mixture of MoO<SUB>2</SUB>(dpco)<SUB>2</SUB> and MoO<SUB>2</SUB>(dpco)(OH)(tbp). The extraction constants, K<SUB>ex</SUB>(=[MoO<SUB>2</SUB>(dpco)<SUB>2</SUB>]<SUB>o</SUB>/[Mo(OH)<SUB>6</SUB>][Hdpco]<SUB>o</SUB><SUP>2</SUP>), were determined to be 7.9×10<SUP>6</SUP> and 3.8×10<SUP>8</SUP>mol<SUP>−2</SUP>dm<SUP>6</SUP> for chloroform and benzene respectively. A black complex formulated as MoO<SUB>2</SUB>(dpco)<SUB>2</SUB>·5H<SUB>2</SUB>O was formed. Molybdenum(VI) can be determined over the range from 1.50 to 19.0 μg/10 cm<SUP>3</SUP> within a relative error of ±4%. The interference of diverse ions will be described.
- 公益社団法人 日本化学会の論文
著者
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Ohashi Kousaburo
Department Of Achemistry Faculty Of Science Ibaraki University
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Yamamoto Katsumi
Department Of Anesthesiology University Of Occupational And Environmental Health School Of Medicine
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Seita Rumiko
Department of Chemistry, Faculty of Science, Ibaraki University
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Nagashima Kiichiro
Department of Chemistry, Faculty of Science, Ibaraki University
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