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Determination of ascorbic acid based on Gold nanoparticles-L-alanine/GCE

机译：金纳米颗粒-L-丙氨酸/ GCE测定抗坏血酸

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摘要

A Gold nanoparticles-L-alanine modified glass electrode has been successfully fabricated by using layer-by-layer self-assembly technology and used for determination of ascorbic acid. First, the clean electrode was immersed into L-Alanine solution to acquire a L-Alanine film on the surface of GCE and dried at room temperature, then the gold colloid was dipped onto the L-Alanine film. The electrochemical behaviors of ascorbic acid at the modified electrode were investigated by cyclic voltammetry and currenttime techniques. The results showed that the sensor produced high sensitivity and good stability to ascorbic acid and the current was linear with the concentration of ascorbic acid in the range of 1.20 ×10-5 to 1.60×10-4 mol/L with a detection limit of 1.00×10-5 mol/L.
机译：金纳米粒子-L-丙氨酸修饰的玻璃电极已通过层层自组装技术成功制备，并用于抗坏血酸的测定。首先，将清洁电极浸入L-丙氨酸溶液中以在GCE表面上获得L-丙氨酸膜，并在室温下干燥，然后将金胶体浸在L-丙氨酸膜上。通过循环伏安法和电流时间技术研究了抗坏血酸在修饰电极上的电化学行为。结果表明，该传感器对抗坏血酸具有较高的灵敏度和稳定性，电流与抗坏血酸的浓度在1.20×10-5至1.60×10-4 mol / L范围内呈线性关系，检出限为1.00 ×10-5 mol / L。

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