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- W2021548071 abstract "8-Hydroxyquinoline-5-sulphonic acid (H2QS) reacts with cobalt(II) in the presence of zephiramine (tetra-decyl-dimethyl-benzyl-ammonium chloride) and gives a yellow green association complex. The ternary complex having an absorption maximum at 405 nm can be extracted into chloroform at pH 6.8–9.3. Beer’s law holds for 2.73–33.0 μg of cobalt(II); molar absorptivity, 1.39×104 cm−1mol−1l. The composition of cobalt(II)-H2QS complexes in water is 1 : 1 at pH 4.4, 1 : 2 at pH 5.8, and 1 : 3 at pH 7.6. The composition of the ternary complex is estimated to be [Co2+(QS2−)2(HQS−)(Z+)3]o. The equilibrium constant for the extractionK=frac[Co2+(QS2−)2(HQS−)(Z+)3]o[Co2+][(HQS−Z+)]o3[OH−]2was determined. It was found that logK=29.01±1.86." @default.
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- W2021548071 date "1972-05-01" @default.
- W2021548071 modified "2023-10-05" @default.
- W2021548071 title "Spectrophotometric Study on The Extraction of The Ternary Complex Composed of Cobalt(II), 8-Hydroxyquinoline-5-sulphonic Acid and Zephiramine" @default.
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- W2021548071 doi "https://doi.org/10.1246/bcsj.45.1430" @default.
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