高原农业2026，Vol.10Issue(3)：331-339,9.DOI:10.19707/j.cnki.jpa.2026.03.007
藏荆芥和康藏荆芥的红外光谱鉴别
Identification of Nepeta hemsleyana and Nepeta prattii by Infrared Spectroscopy
摘要
Abstract
To achieve reliable discrimination between Nepeta hemsleyana and Nepeta prattii,this study,employed Fourier transform infrared spectroscopy(FTIR)combined with second-derivative infrared spectroscopy to establish a rapid and specific identification method.The original infrared spectra of Nepeta hemsleyana,Nepeta prattii,and E,Z-nepetalactone were acquired using an FTIR spectrometer.Spectral data were preprocessed using OMNIC 9.0 software,and the spectra were visualized using OriginPro 2024.A systematic comparison of the infrared spectral characteristics and differences between the two species was conducted.The results showed that the original FTIR spectra of Nepeta hemsleyana and Nepeta prattii were generally similar,with nine common absorption peaks identified at 3 725,3 704,3 420,2 926,2 853,1 652,1 260,1 158,and 1 065 cm-1.However,notable differences in peak intensities were observed at 3 420 and 1 652 cm-1.Comparison with the reference spectrum of E,Z-nepetalactone confirmed the presence of this compound in both species,with stronger characteristic absorption peaks observed in Nepeta hemsleyana,suggesting a relatively higher content of E,Z-nepetalactone.Furthermore,second-derivative spectra in the ranges of 1 800～1 200 cm-1 and 1 200～400 cm-1 revealed significant differences between the two species in carbonyl groups,double bonds,and fingerprint regions,enabling effective discrimination between them.The FTIR-based method established in this study is rapid,non-destructive,and highly reproducible.It provides a novel technical approach for the rapid identification of closely related and easily confused Nepeta species used in Xizang's medicine,thereby addressing the limitations of traditional identification methods.关键词
藏荆芥/康藏荆芥/红外光谱法鉴别Key words
Nepeta hemsleyana/Nepeta prattii/Identification by infrared spectroscopy分类
化学化工引用本文复制引用
李永恒,王婷婷,蒋娜,边巴拉姆,兰小中..藏荆芥和康藏荆芥的红外光谱鉴别[J].高原农业,2026,10(3):331-339,9.基金项目
藏荆芥化学成分及药理活性研究(Z2024023)西藏自治区科技厅基地与人才项目(Nos.XZ202501JD0026) （Z2024023）
第四次全国中药资源普查西藏自治区中(藏)药资源普查(20200501-542301) （藏）
西藏农牧学院林学博士点(一期)(533325001). （一期）
