文章研究了L-赖氨酸修饰玻碳电极的制备,采用快速循环伏安法测定维生素C片剂中抗坏血酸含量,并对实验条件进行了选择。结果表明,在pH值为4.8的磷酸盐缓冲溶液中测抗坏血酸浓度时,其线性形范围为0.0600～0.6000g.L-1,R2=0.9872。该修饰电极用于抗坏血酸含量的分析,有良好的稳定性和抗干扰能力,结果令人满意。 The preparation of L-lysine-modified glassy carbon electrode was studied in this paper. The content of ascorbic acid in vitamin C tablets was determined by rapid cyclic voltammetry. The experimental conditions were selected. The results showed that the linear range was 0.0600-0.6000g.L-1 and R2 = 0.9872 when the concentration of ascorbic acid was measured in pH 4.8 phosphate buffer solution. The modified electrode for the analysis of ascorbic acid content, with good stability and anti-interference ability, the results are satisfactory.