Solid Ion-Exchange Electrode Selective for Calcium Ion

Science  11 Oct 1968:
Vol. 162, Issue 3850, pp. 267-268
DOI: 10.1126/science.162.3850.267


A calcium-selective electrode with solid ion exchanger was prepared from a solution of the calcium salt of a dialkylphosphoric acid in collodion. The electrode responds rapidly and reproducibly to activity of calcium ion and demonstrates a selective response for calcium ion in the presence of alkaline earth and alkali metal cations.