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Improved Flow Injection Analysis of H 2 O 2 on Cinder/Prussian Blue‐Modified Electrodes by CTAB Micelles
Author(s) -
Zen JyhMyng,
Chen PeiYan,
Kumar Annamalai Senthil
Publication year - 2002
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200200129
Subject(s) - cinder , chemistry , prussian blue , flow injection analysis , micelle , electrochemistry , electrode , redox , critical micelle concentration , analytical chemistry (journal) , detection limit , inorganic chemistry , chromatography , organic chemistry , aqueous solution , coal
In the present work, a new strategy involving the addition of CTAB at its critical micelle concentration was developed to improve the electrochemical properties of the cinder/PB‐modified screen‐printed electrode (designated as cinder/PB‐SPE) in the detection of H 2 O 2 by flow injection analysis (FIA). Such new PB hybrids derived from cinder have remarkable stability even under strong hydrodynamic stress. The cylindrical CTAB micelles formed at the 2 nd critical micelle concentration can effectively promote the PB redox behavior. Under optimized conditions with pH 7 PBS + 7 mM CTAB as carrier solution in FIA, a linear calibration was obtained up to 25 μM H 2 O 2 with slope, regression coefficient, and detection limit (S/N = 3) of 1.03 A/Mcm 2 , 0.995, and 4.02 μM respectively. Interferences by direct electrochemical oxidation of easily oxidizable substances can be prevented due to the low detecting potential of the working system.