Title of article
A l-tryptophan sensor based on tellurium nanorods modified glassy carbon electrode
Author/Authors
Sheng, Qinglin Institute of Analytical Science - Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry - Northwest University, Xi’an, China , Liu, Ruixiao Institute of Analytical Science - Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry - Northwest University, Xi’an, China , Zhang, Hongfang Institute of Analytical Science - Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry - Northwest University, Xi’an, China , Zheng, Jianbin Institute of Analytical Science - Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry - Northwest University, Xi’an, China
Pages
7
From page
1189
To page
1195
Abstract
An electrochemical l-tryptophan sensor based on tellurium nanorods modified glassy carbon electrode was proposed. The tellurium nanorods were synthesized by a chemical reduction method. The morphology and structures of the nanorods were characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). Owing to the special structure of the tellurium nanorods, the sensor exhibits excellent electrocatalytic ability towards the oxidation of l-tryptophan and shows linearity in the range from 0.02 to 11.48 μM with a sensitivity of 256 μA mM−1 cm−2 with a correlation coefficient of 0.9945. The detection limit was 0.01 μM with signal-to-noise ratio of 3, and the response time was found to be 2 s. Moreover, the sensor also exhibited long-term stability, good reproducibility and anti-interference, thus holding promise for sensing of l-tryptophan in practice.
Keywords
Tellurium nanorods , l-tryptophan , Amperometry , Electrochemical sensor
Journal title
Astroparticle Physics
Serial Year
2016
Record number
2407012
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