A potentiometric study of the reactions of some anions with 1,2,4,6-tetraphenylpyridinium acetate. II. Organic anions

Summary A new titrant, 1,2,4,6-tetraphenylpyridinium acetate, has been evaluated for the potentiometric precipitation titration of semimicro amounts of a series of organic anions. Emf's were monitored with a perchlorate ion-selective electrode and a double-junction reference electrode. The nitrate and fluoroborate ion-selective electrodes also responded to the various anions. The classes of compounds which can be determined are nitroform and some nitroform-yielding compounds, phenylborates, 2,4,6-trinitro compounds, some dinitrophenols and nitrophenols, some halogenated phenols and others.

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Zusammenfassung 1,2,4,6-Tetraphenyrpyridiniumacetat wurde für die potentiometrische Fällungstitration von Halbmikromengen einer Reihe organischer Anionen herangezogen. Die elektromotorische Kraft wurde mit einer ionenselektiven Perchloratelektrode und einer doppelt verbundenen Bezugselektrode gemessen. Auch ionenselektive Nitrat- und Fluoboratelektroden sprechen auf die verschiedenen Anionen an. Folgende Verbindungsgruppen können so bestimmt werden: Nitroform und dessen Verbindungen, Phenylborate, 2,4,6-Trinitroverbindungen, einige Dinitro- und Mononitrophenole, manche Halogenphenole und dgl.

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Parts of this paper were presented at the 9th Meeting of the JANNAF Propellant Characterization Subcommittee Meeting at the U. S. Air Force Academy, Colorado Springs, CO, June 6–8, 1978. — Work performed under the auspices of the U. S. Department of Energy by the Lawrence Livermore Laboratory under contract number W-7405-ENG-48.