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利用荷叶萃取液生物合成纳米金,并与多壁碳纳米管/L-半胱氨酸复合成修饰电极材料,研究了左旋多巴在该修饰电极上的电化学行为.在0.2 mol/L乙酸-乙酸钠体系(pH=2.6)中,氧化峰电流与左旋多巴浓度在0.6~40μmol/L及60~120μmol/L范围内呈良好的线性关系,检出限达5.2×10-8mol/L.实验结果表明,生物合成纳米金复合多壁碳纳米管/L-半胱氨酸修饰电极具有良好的稳定性和高灵敏度,对实际样品测定的回收率在91.2%~102.5%之间.
The electrochemical performance of levodopa on the modified electrode was studied by biosynthesizing gold nanoparticles with lotus leaf extract and synthesizing electrode materials with multi-walled carbon nanotubes / L-cysteine complex.After 0.2 mol / L In acetic acid - sodium acetate system (pH = 2.6), the oxidation peak current was linear with the concentration of levodopa in the range of 0.6 ~ 40μmol / L and 60 ~ 120μmol / L with the detection limit of 5.2 × 10-8mol / L. The experimental results show that biosynthesis of gold nanoparticles composite multi-walled carbon nanotubes / L-cysteine modified electrode has good stability and high sensitivity, the recovery of the actual sample was measured between 91.2% to 102.5%.