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Phosphate glass electrode with good selectivity for alkaline-earth cations

A.H. Truesdell·A. M. Pommer
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Abstract

A phosphate glass has been found to have a significant electrode specificity toward alkaline-earth ions. The order of selectivity is 2H + > Ba ++ > Sr ++ > Ca ++ > 2K + > 2Na + > Mg ++ . Exchange properties are discussed in relation to possible structure. Its use to determine activity of Ca ++ in natural systems containing Mg ++ is suggested.

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A.H. Truesdell, A. M. Pommer. 1963. Phosphate glass electrode with good selectivity for alkaline-earth cations. https://doi.org/10.1126/science.142.3597.1292

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