Silicomolybdate‐Incorporated‐Glutaraldehyde‐Cross‐Linked Poly‐L‐Lysine Film Modified Glassy Carbon Electrode as Amperometric Sensor for Bromate Determination |
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Authors: | R Thangamuthu Yu‐Ching Wu Shen‐Ming Chen |
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Institution: | Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No.?1, Section 3, Chung‐Hsiao East Road, Taipei, Taiwan 106 (Republic of China) |
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Abstract: | 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. |
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Keywords: | Amperometric sensor Bromate determination Cross‐linked poly‐L‐lysine film Silicomolybdate Electrocatalysis Thin films |
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