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Nonmonotonic Transient Potential Signals with an 18‐Crown‐6 based Ion‐Selective Electrode in a Flow‐Injection System
Author(s) -
Ortuño Joaquín A.,
SánchezPedreño Concepción,
Martinez Domingo
Publication year - 2003
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200302725
Subject(s) - transient (computer programming) , ion , electrode , signal (programming language) , analytical chemistry (journal) , flow (mathematics) , chemistry , transient response , range (aeronautics) , materials science , electrode potential , mechanics , chromatography , electrochemistry , physics , composite material , electrical engineering , organic chemistry , computer science , programming language , engineering , operating system
The dynamic potential response of an 18‐crown‐6 based ion‐selective electrode towards Li + , Na + , K + and Ca 2+ , in a flow‐injection system is studied. Different double nonmonotonic transient signals are obtained for the different ions. The influence of the flow‐injection variables and of ion concentration on the signals is studied. Two signal parameters, the relative return rates, are found to be characteristic for each ion and are constant for a concentration range of 1–3 decades. The nonmomotonic transient signals obtained are explained by reference to the theoretical models reported.