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- W341710695 abstract "The interaction of gallium ions with 7-(1-naphthylazo)-8hydroxyquinoline- 5-sulfonic acid was studied. It was found that gallium reacts with 7-(1- naphthylazo)-8-hydl oxyquinoline-5-sulfonic acid in a molar ratio 1: 1, the molar extinction coefficient of the compound formed is 1.56 x 10/sup 4/, and the equilibrium constant of the reaction studied is 0.96 x 10/sup 2/. It is shown that 7-(1-naphthylazo)-8-hydroxyquinoline5-sulfonic acid may be used as indicator in the direct titration of gallium ions with complexone III at pH 2.2 and higher. Calcium, magnesium, manganese, cadmium, and zinc ions do not interfere with the complexometric determination of gallium, as well as aluminum ions in the presence of fluorine ions. A method for the synthesis of 7-(1naphthylazo)-8- hydroxyquinoline-5-suifonic acid is spectfied. (auth)" @default.
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- W341710695 date "1962-03-01" @default.
- W341710695 modified "2023-09-23" @default.
- W341710695 title "DIRECT COMPLEXOMETRIC TITRATION OF GALLIUM IN THE PRESENCE OF 7-(1- NAPHTHYLAZO)-8-HYDROXYQUINOLINE-5-SULPHONIC ACID AS AN INDICATOR" @default.
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