Method: Two indexes, common peak ratio and variation peak ratio, are used to compare the IR spectra of various Radix Glycyrrhizae samples, and the values are calculated by means of sequent analysis.

• 结果与结论:利用共有峰率和变异峰率双指标序列分析法可以对2个或多个不同品种、不同产地甘草样品进行方便可靠的鉴别。