Zinc Selective Ionophores for Potentiometric and Optical Sensors


Iminodiacetamide derivatives were synthesized and studied as ionophores in plasticized poly(vinyl chloride) membranes with potentiometric and optical transduction. The N-benzyl and N-phenyl derivatives proved to have a distinct zinc selectivity preferring Zn2+ over Ca2+, Na+ by factors of 6x105 and 3x104, respectively. All ionophores exhibit a serious proton interference (logKPottzn + +,H1+ - 6) which suggests that all application of this type of ionophores based sensors are limited to hydrogen ion buffer solution at pH ≥ 6. © 1992, Taylor & Francis Group, LLC. All rights reserved.

Publication Title

Analytical Letters