Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10269279 | Electrochimica Acta | 2005 | 6 Pages |
Abstract
A multiwall carbon nanotubes (MWNTs)-chitosan modified glassy carbon electrode (GCE) exhibits attractive ability for highly sensitive cathodic stripping voltammetric measurements of bromide (Brâ). In pH 1.8 H2SO4 solution, a substantial increase in the stripping peak current of Brâ (compared to bare GCE and chitosan modified GCE) is observed using MWNTs-chitosan modified electrode. Operational parameters were optimized and the electrochemical behaviors of Brâ were studied by different electrochemical methods. The kinetics parameters were measured, the number of electron transfer (n) was 1 and the transfer coefficient (α) is 0.17. A wide linear calibration range (3.6 Ã 10â7-1.4 Ã 10â5 g mLâ1) was achieved, with a detection limit of 9.6 Ã 10â8 g mLâ1. The mechanism of electrode reaction was fully discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yan Zeng, Zhi-Hong Zhu, Rui-Xia Wang, Guang-Han Lu,