Design and characterization of sodium-selective optode membranes based on the lipophilic tetraester of calix[4]arene
- 1 January 1995
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 120 (7) , 1963-1967
- https://doi.org/10.1039/an9952001963
Abstract
Four types of lipophilic calixarene ionophores have been used in the design of sodium-selective optode membranes. Plasticized poly(vinyl chloride)(PVC) membranes incorporating the tetraester of calix[4]arene and a neutral H+-selective chromo-ionophore (ETH 5294) have proved to be excellent reversible sensing devices for the optical determination of the sodium cation in pH-buffered solutions. At pH 9.0, the absorbance response of the optode shows a good correlation with the theoretically derived formula in the range from 1 × 10–6 to 10–2 mol l–1 sodium ion. Dynamic range, reproducibility, response time and the selectivity of the new optode membranes are discussed.Keywords
This publication has 0 references indexed in Scilit: