金纳米修饰毛细管电泳分离氨基苯甲酸

报道了一种金纳米修饰毛细管电泳分离、测定氨基苯甲酸的新方法。采用制备的金纳米进行了石英毛细管修饰。探讨了修饰金纳米浓度、修饰时间以及缓冲溶液加入一定浓度的金纳米对三种氨基苯甲酸分离和测定的影响，优化了分离电压、酸度以及缓冲溶液浓度等实验条件。结果表明金纳米的存在，显著的改进了氨基苯甲酸分离的选择性，增强了分离效率。在优化的实验条件下，进行了邻、间、对三种氨基苯甲酸的分离和测定。线性浓度范围为0.5–40 µg·mL，相关系数0.9978-0.9992。检测限(S/N = 3) 为0.1-0.5µg·mL。

Separation of Aminobenzoic Acids by Gold Nanoparticle‐ modified Capillary Electrophoresis

A novel method for the separation of aminobenzoic acids by capillary electrophoresis was developed. The capillary was modified with gold nanoparticles. The effect of gold nanoparticles on the resolution and selectivity of separation was investigated. The influence of separation voltage, pH and buffer concentration on the separation of aminobenzoic acids was also examined. It was found that the presence of gold nanoparticles improved the precision of the analysis and increased the separation efficiency. Under the optimized experiment conditions, aminobenzoic acids were separated and determined. Linearity was established over the concentration range 0.5–40 µg·mL^?1 with correlation coefficients of 0.9978–0.9992. The detection limits (S/N=3) were from 0.1 to 0.5 µg·mL^?1.