Objective: To establish the method for identification of Codonopsis Radix and Gentianae Macrophylae Radix. Method: In a glass reactor with diameter less than 0.125 mm of Chinese herbal medicine powder (accurate to 0.002 g) as the substrate of reaction

the H+-Mn2+-CH3COCH3-BrO3- for oscillation system. Temperature kept at 310 K and the stirring speed was 310 r·min-1. With saturated calomel electrode as reference

the platinum electrode as indicator electrode

the electrochemical workstation records of chemical potential in the oscillation system

along with the change of time. Draw E-t curve using Origin 7.5 software

get the non-linear electrochemical fingerprint. The character of parameters:the highest potential

induction time

oscillation oscillation cycle and service life

calculate the activation energy of reaction

using cluster analysis method to study. Result: The repeatability is good

the non-linear electrochemical fingerprint intuitively see the party to participate in the non-linear electrochemical fingerprint has obvious difference

also have obvious different characteristic parameters

sample cluster analysis divided into two categories. Conclusion: This method can be used to identify Codonopsis Radix and Gentianae Macrophylae Radix.