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Measurement of total alkali and phenol in process liquor by FIA

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Abstract

Flow injection analysis (FIA) has been applied to the determination of total phenol and total alkali in high concentration alkaline phenoxide liquors as it occurs in industrial process streams. The total alkali content and total phenol content in samples containing 20–50% (w/v) sodium phenoxide can be directly measured without mutual interference. The first is measured by peak width measurement based FIA with conductimetric detection utilizing an electronic circuit to permit automatic measurement from minima to minima. The total phenol is measured by the Berthelot reaction using NaOCl and ammonia to form indophenol blue, monitored at 660 nm with a light emitting diode-based detector.

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Authors and Affiliations

  1. Department of Chemistry and Biochemistry, Texas Tech University, 79409-4260, Lubbock, TX, USA

    J. A. Sweileh, P. K. Dasgupta & J. L. Lopez

Authors
  1. J. A. Sweileh
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  2. P. K. Dasgupta
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  3. J. L. Lopez
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Sweileh, J.A., Dasgupta, P.K. & Lopez, J.L. Measurement of total alkali and phenol in process liquor by FIA. Mikrochim Acta 90, 175–186 (1986). https://doi.org/10.1007/BF01364299

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  • DOI: https://doi.org/10.1007/BF01364299

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