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:
Nov. 18, 2014
Filed:
Dec. 31, 2013
Raman spectroscopy method of measuring melamine contents in dairy products having different matrixes
Nuctech Company Limited, Beijing, CN;
Tsinghua University, Beijing, CN;
Zhiqiang Chen, Beijing, CN;
Li Zhang, Beijing, CN;
Jianhong Zhang, Beijing, CN;
Hongqui Wang, Beijing, CN;
Ziran Zhao, Beijing, CN;
Jianping Gu, Beijing, CN;
Zhiming Wang, Beijing, CN;
Qingping Huang, Beijing, CN;
Yumin Yi, Beijing, CN;
Nuctech Company Limited, Beijing, CN;
Tsinghua University, Beijing, CN;
Abstract
A raman spectroscopy method of measuring melamine contents in dairy products having different matrixes. The method includes: (a) establishing a database of characteristic curves of dairy products having different matrixes; (b) taking several copies of the dairy products having one certain unknown matrix and adding melamine standard solutions having different concentrations therein, to obtain a series of dairy product samples in which the relative concentrations of the melamine are known; (c) performing raman spectrum testing analysis and obtaining corresponding characteristic peak intensities to obtain a slope of the characteristic curve showing variation of the characteristic peak intensities with the relative concentrations of the melamine; (d) searching the database of step (a) using the slope of the characteristic curve of the dairy product samples to find a matching characteristic curve, and (e) calculating concentration of melamine in the dairy products by using the matched characteristic curve and the characteristic peak intensity.