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- W2056570423 abstract "Oxine and its derivatives, oxine-5-sulphonic acid, ferron, and 2-methyloxine, yield two a.c. waves at the positive region of the dropping mercury electrode. Wave I at more positive polarization, although ill-defined in the cases of oxine-5-sulphonic acid and ferron, is the so-called transition wave, and wave II at more negative potentials is a tensammetric wave. The height of wave II is dependent on pH, and the pH-region at which maximum wave height is obtained is specific to the compound, depending on its pk-value. Oxine and its derivatives can exist as three species according to the pH of the solution: i.e., acidic, neutral and basic forms. The neutral species of oxine, oxine-5-sulphonic acid and 2-methyloxine mainly contribute to wave II, while for ferron, both acidic and neutral species can contribute to wave II. The addition of certain metal ions that form chelates with oxine or its derivatives quantitatively depress wave II. This fact can be used to detect the end-point of titrations of metal ion in very dilute concentrations. The theoretical possibility of the titration has been considered." @default.
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- W2056570423 date "1969-04-01" @default.
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- W2056570423 title "A.C. Polarographic studies of oxine and its derivatives" @default.
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- W2056570423 doi "https://doi.org/10.1016/s0022-0728(69)80038-0" @default.
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