Scientists developed a method using capillary zone electrophoresis to detect vanillin, ferulic acid, and vanillic acid in Chinese medicines. The three substances were successfully separated within 10 minutes. The method showed a strong relationship between peak area and concentration for each compound. The detection limits were found to be 0.49, 0.56, and 0.38 μg/mL for vanillin, ferulic acid, and vanillic acid, respectively. When applied to Chinese medicine samples, the method provided accurate results. Recovery experiments confirmed the reliability of the method.