Assessment of Potassium Zinc Ferrocyanide as an Alkali-Metal Ion-Exchanger in Ion-Selective Electrodes
- 1 August 1974
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 7 (8-9) , 539-543
- https://doi.org/10.1080/00032717408058786
Abstract
Silicone rubber membranes containing potassium zinc ferrocyanide have been assessed as ion-selective electrode sensors for the determination of alkali metal ions. The slope of the calibration graph for potassium ion is 59 mV per decade change in concentration within the concentration range 5 × 10−4 to 10−1 M at 25°C. Selectivity constants (KK + /M+)are 9. 5, Cs+; 3. 3, Rb+; 0. 025, Na+; 0. 003, Li+; and 1.8, NH4 +, calculated from potential data obtained at 10−1 M concentrations of each ion separately. Similar membranes prepared from PVC responded similarly with a slight improvement in selectivity.Keywords
This publication has 4 references indexed in Scilit:
- A silicone-rubber surfactant electrodeAnalytica Chimica Acta, 1974
- Synthetic inorganic ion exchangers—II Salts of heteropolyacids, insoluble ferrocyanides, synthetic aluminosilicates and miscellaneous exchangersTalanta, 1972
- A calcium-sensitive electrode based on a liquid ion exchanger in a poly(vinyl chloride) matrixThe Analyst, 1970
- Coprecipitation of substituted anilines with zinc ferrocyanide: analysis of p-aminobenzoic acid-procaine mixturesAnalytica Chimica Acta, 1965