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Determination of standard pH values for sodium hydrogen diglycolate buffer (0.05m) from 5–65°C

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Abstract

Values of pa oH for 0.05 mole-kg−1 aqueous solutions of sodium hydrogen diglycolate in the temperature range 5–65°C have been obtained from cells without transport, and can be fitted to the equation

$$\begin{gathered} pa^\circ _H = 3.5098 + 2.222 \times 10^{ - 3} ({T \mathord{\left/ {\vphantom {T {K - 298.15}}} \right. \kern-\nulldelimiterspace} {K - 298.15}}) \hfill \\ + 2.628 \times 10^{ - 5} ({T \mathord{\left/ {\vphantom {T {K - 298.15}}} \right. \kern-\nulldelimiterspace} {K - 298.15}})^2 \hfill \\ \end{gathered} $$

The analysis has been carried out by a multilinear regression procedure using a form of the Clarke and Glew equation. This buffer standard may be a useful alternative to the saturated potassium hydrogen tartrate buffer.

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Authors and Affiliations

  1. Department of Physical Chemistry, University of Newcastle, NE1 7RU, Newcastle upon Tyne, U.K.

    Arthur K. Covington & John Cairns

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  1. Arthur K. Covington
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  2. John Cairns
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Covington, A.K., Cairns, J. Determination of standard pH values for sodium hydrogen diglycolate buffer (0.05m) from 5–65°C. J Solution Chem 9, 517–523 (1980). https://doi.org/10.1007/BF00647740

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  • DOI: https://doi.org/10.1007/BF00647740

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