The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2025
Filed:
Aug. 27, 2021
University of Shanghai for Science and Technology, Shanghai, CN;
Chongqing Institute for Food and Drug Control, Chongqing, CN;
Yan Peng, Shanghai, CN;
Linggao Zeng, Chongqing, CN;
Yiming Zhu, Shanghai, CN;
Qingrou Yang, Shanghai, CN;
Chenjun Shi, Shanghai, CN;
Xu Wu, Shanghai, CN;
Songlin Zhuang, Shanghai, CN;
University of Shanghai for Science and Technology, Shanghai, CN;
CHONGQING INSTITUTE FOR FOOD AND DRUG CONTROL, Chongqing, CN;
Abstract
A method for qualitative identification and quantitative determination of caffeine in a drug. In the method, terahertz absorption coefficient spectra of drugs with different concentrations of caffeine are measured, from which the frequency points, amplitudes and peak areas of characteristic peaks of the drugs with different concentrations of caffeine are obtained as characteristic quantities. Concentration gradients are established between the concentrations and the characteristic quantities, respectively. The characteristic quantities are imported to the SVR model to establish a training set and a test set. Finally, the qualitative identification and quantitative analysis of caffeine in unknown drugs are achieved.