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Citation: XU Xiu-Qin, CAI Duo-Chang, ZOU Ru-Yi, HE Xiao-Ying. Quantitative Analysis of Vitamin B₆ by Cyclic Voltammetry[J]. Chinese Journal of Applied Chemistry, ;2004, 21(10): 1016-1019. shu

Quantitative Analysis of Vitamin B₆ by Cyclic Voltammetry

1.
Institute of Chemistryand Chemical Engineering, China West Normal University, Nanchong 637002

Corresponding author: CAI Duo-Chang,
Received Date: 20 November 2003
Available Online: 11 May 2004

The carboxylated MWNT was dispersed in acetone and a drop of the suspension on GCE was dried to yield a multi-wall carbon nanotube modified glassy carbon electrode(MWNT/GCME). Vitamin B₆ could be directly determined using the MWNT/GCME as working electorde by cyclic voltammetry in a buffer solution of NH₄Cl-NH₃·H₂O(pH=8.0). The results showed that the peak current was proportional to the concentration of VB₆ over the concentration range of 1.0×10^-6 to 1.0×10^-3 mol/L at the scan rate of 100 mV/s, and the detection limit was 1.0×10^-6 mol/L with a correlation coeffecient of 0.998. Using this modified electrode, the VB₆ content in a VB₆ tablet was determined satisfactorily.
- vitamin B₆,
- quantitative analysis,
- multi-wall carbon nanotube,
- modified glassy carbon electrode,
- cyclic voltammetry
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Quantitative Analysis of Vitamin B₆ by Cyclic Voltammetry