A Novel Colorimetric Reagent for Potassium Based on Crown Ether Complex Formation
- 1 January 1977
- journal article
- research article
- Published by Taylor & Francis in Analytical Letters
- Vol. 10 (13) , 1115-1122
- https://doi.org/10.1080/00032717708067847
Abstract
The extraction study of alkali metal ions was made with a new type of crown ether, 4′-picrylaminobenzo-15-crown-5 (HL). Upon dissociation in alkaline medium orange-colored HL gives blood-red anion, L−, and extracts selectively K+ (and to a lesser extent Rb+) ion into chloroform as a colored complex of composition ML·HL. A colorimetric determination of 10 - 400 ppm K+ in the presence of < 2000 ppm Na+ was possible using this new crown ether reagent.This publication has 3 references indexed in Scilit:
- Substituent effects on the stability of cation complexes of 4'-substituted monobenzo crown ethersJournal of the American Chemical Society, 1976
- Les CryptatesTetrahedron Letters, 1969
- Cyclic polyethers and their complexes with metal saltsJournal of the American Chemical Society, 1967