title: Phosphate Glass Electrode with Good Selectivity for Alkaline-Earth Cations.
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 sug gested.
authors.forename: A H
authors.initials: AH
authors.lastname: Truesdell
authors.forename: A M
authors.initials: AM
authors.lastname: Pommer