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Microdetermination of the arsonic group in organic compounds by titration in non-aqueous solvents

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Summary

The arsonic group in organic compounds is determined titrimetrically in dimethylformamide using sodium methoxide. Bromophenol red is recommended as a visual indicator. One mole of the titrant is cosumed per mole of the compound. Phenolic hydroxyl group does not interfere. The precision is ± 0.2 %. Dimethylformamide with phenolphthalein or benzene with thymol blue may also be used but hydroxyl group if present interfere.

Zusammenfassung

Die Arsonsäuregruppe läßt sich in organischen Verbindungen maßanalytisch in Dimethylformamidlösung mit Natriummethylat titrieren. Bromphenolrot wird als Indikator empfohlen. Ein Mol Methylat wird für ein Mol Substanz verbraucht. Phenolische Hydroxylgruppen stören nicht. Die Genauigkeit beträgt ±0,2%. Dimethylformamid und Phenolphthalein bzw. Benzol und Thymolblau kann man auch verwenden, aber dabei stören Hydroxylgruppen.

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Authors and Affiliations

  1. Research Microanalytical Laboratory, Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, Egypt

    S. S. M. Hassan & M. B. Elsayes

Authors
  1. S. S. M. Hassan
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  2. M. B. Elsayes
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Hassan, S.S.M., Elsayes, M.B. Microdetermination of the arsonic group in organic compounds by titration in non-aqueous solvents. Mikrochim Acta 61, 801–807 (1973). https://doi.org/10.1007/BF01218139

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  • DOI: https://doi.org/10.1007/BF01218139

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