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- W2015139493 abstract "The solvent extraction of the copper–Pyrocatechol Violet chelate with tridodecylethylammonium bromide (abbreviated TDEA) in benzene as an ion-association system has been investigated by the spectrophotometric method. The copper–PV–TDEA complex can be extracted into such aromatic hydrocarbons as benzene, toluene, and xylene, but not into such polar solvents as n-butanol, ethyl acetate, methylisobutylketone, and nitrobenzene. When a sample solution containing copper and PV, the pH of which has been adjusted to 7.5–8.5, is shaken with TDEA in benzene for 10 s, the maximum extraction of the ternary complex is obtained. The extractability of the complex from 50 ml of an aqueous solution into 10 ml of benzene is 98.3% under the optimum conditions. The absorbance and stability of the complex increase upon the addition of a small amount of ethanol to the extracted layer. Beer’s law is obeyed up to 6.5 μg copper per 10 ml of benzene, and the molar absorptivity of the complex is 7.9×104 cm−1·mol−1·l at 663 nm. The ..." @default.
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- W2015139493 date "1974-07-01" @default.
- W2015139493 modified "2023-09-27" @default.
- W2015139493 title "The Solvent Extraction of the Copper–Pyrocatechol Violet Chelate with Tridodecylethylammonium Bromide" @default.
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- W2015139493 doi "https://doi.org/10.1246/bcsj.47.1642" @default.
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