The test is to control quality of Gentiana straminea Maxim. by near infrared spectroscopy. Samples were collected throughout Qinghai-Tibet Plateau, in which the bioactive ingredients were gentiopicroside and loganic acid. Sample set was divided using concentration gradient method. Modeling optimization was processed with a designed orthogonal test L9 (33). Pretreatment of spectra was multiplicative scatter correction+second derivative, and partial least square was used to establish model. The model showed high R and low root mean square error. Moreover, residual predictive deviation was 3.14. The present quantitative model can fast and accurately determine the quality of G. straminea.

　　This study was supported by the National Natural Science Foundation of China [No. 81403051], Natural Science Foundation of Qinghai (No. 2019-ZJ-904), Xining Science and Technology Bureau Key Research and Transformation Plan [No. 2018-Y-59], Qinghai special project of innovation platform for basic conditions of scientific research [2020-ZJ-T05].

　　This results were published in Spectroscopy Letters.

　　The link below will guide you to the reading:

　　http://www.zoores.ac.cn/en/article/doi/10.24272/j.issn.2095-8137.2020.050