P1.1.11 Determination of Ltryptophan in the presence of ascorbic acid and dopamine using poly (sulfosalicylic acid) modified glassy carbon electrode
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.1 Biosensors
- Author(s)
- X. Ba, L. Luo, Y. Ding, X. Liu - Department of Chemistry, Shanghai University, (P R. China)
- Pages
- 843 - 846
- DOI
- 10.5162/IMCS2012/P1.1.11
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
In this work, a glassy carbon electrode modified with poly-sulfosalicylic acid (PSA/GCE) was prepared by electropolymerization and applied for the determination of L-Tryptophan (L-Trp) in the presence of ascorbic acid and dopamine. The morphologies and interface properties of PSA film were examined by scanning electron microscopy and electrochemical impedance spectroscopy.The electrocatalytic oxidation of L-Trp was investigated on the PSA/GCE using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The proposed method exhibited wide linear response of 5×10^-8 to 4×10^-4M with low detection limit and high selectivity, making it suitable for the analytical purpose.