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Characterization of a wall‐jet electrode/flow‐injection analysis system
Author(s) -
Huang Yu Liang,
Khoo Soo Beng,
Yap Miranda G. S.
Publication year - 1994
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.1140061127
Subject(s) - electrode , volumetric flow rate , jet (fluid) , anode , materials science , current (fluid) , analytical chemistry (journal) , flow (mathematics) , analyte , volume (thermodynamics) , packed bed , chemistry , mechanics , chromatography , thermodynamics , physics
A “wall‐jet” electrode (WJE) was studied as an electrochemical deteaor for flow‐injection analysis (FIA). Mathematical expressions were obtained for the peak current responses of the electrode, both for an uncoiled open tubular conduit and also in the presence of a packed‐bed reactor between the injection valve and detector. The derived relationships between peak current and volumetric flow rate, and injected sample volume and concentration of the analyte were verified by using the ferricyanide ion and hydrogen peroxide as test samples. In general, theory and experiment were in good agreement although a discrepancy in the volumetric flow rate dependence of the peak current was observed in the presence of a packed‐bed reactor.