# Protected Geographical Indication Discrimination of Zhejiang and Non-Zhejiang Ophiopogonis japonicus by Near-Infrared (NIR) Spectroscopy Combined with Chemometrics: The Influence of Different Stoichiometric and Spectrogram Pretreatment Methods

> Research article (Molecules, 2023) · cited 19× · AI/ML

**Wikidata**: [openalex:W4328107845](https://www.wikidata.org/wiki/openalex:W4328107845)  
**Source**: https://4ort.xyz/entity/protected-geographical-indication-discrimination-of-zhejiang-and-non-zhejiang-ophiopogonis-japonicus-by-near-infrared-ni