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Determination of the Equilibrium Constants of Alkylphosphinic Acids by Inductively Coupled Plasma-Atomic Emission Spectrometry

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Abstract

The equilibrium constants of some organophosphinic acids have been determined at 25°C by measuring the distribution ratio of the organophosphinic acid between an aqueous solution of ionic strength 0.05 and toluene as a function of pH for different concentrations of organophosphorus acid compounds. The distribution ratio of the organophosphorus compounds has been obtained by determining phosphorus by inductively coupled plasma-atomic emission spectroscopy. The data have been analyzed graphically, and numerically by the program LETAGROP-DISTR, in order to determine the dimerization constants K2, the acidity constants Ka and the distribution constants KD

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Authors and Affiliations

  1. Chemical Engineering Department, Universitat Politècnica de Catalunya, E. T. S. E. I. B. Diagonal 647, E-08028, Barcelona, Spain

    M. Martinez, N. Miralles, A. Sastre & C. Herranz

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  1. M. Martinez
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  2. N. Miralles
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  3. A. Sastre
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  4. C. Herranz
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Martinez, M., Miralles, N., Sastre, A. et al. Determination of the Equilibrium Constants of Alkylphosphinic Acids by Inductively Coupled Plasma-Atomic Emission Spectrometry. ANAL. SCI. 8, 613–617 (1992). https://doi.org/10.2116/analsci.8.613

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  • DOI: https://doi.org/10.2116/analsci.8.613

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