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Silicomolybdate‐Incorporated‐Glutaraldehyde‐Cross‐Linked Poly‐ L ‐Lysine Film Modified Glassy Carbon Electrode as Amperometric Sensor for Bromate Determination
Author(s) -
Thangamuthu R.,
Wu YuChing,
Chen ShenMing
Publication year - 2009
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.200904576
Subject(s) - bromate , amperometry , glutaraldehyde , materials science , electrode , overpotential , glassy carbon , chemical engineering , chemistry , electrochemistry , chromatography , ion , organic chemistry , cyclic voltammetry , engineering
Silicomolybdate‐doped‐glutaraldehyde‐cross‐linked poly‐ L ‐lysine (PLL‐GA‐SiMo) film modified glassy carbon electrode was successfully prepared by means of electrostatically trapping the silicomolybdate anion in PLL‐GA cationic coating. The PLL‐GA‐SiMo film was stable and the charge transport through the film was fast. The modified electrode shows excellent electrocatalytic activity towards bromate reduction with significant reduction of overpotential. In amperometric determination of bromate, the calibration plot was linear over the concentration range of 5×10 −5 to 1.2×10 −3 M with a sensitivity of 3.6 μA mM −1 . Furthermore, PLL‐GA‐SiMo film electrode showed fast response and good stability.