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:
Dec. 06, 2022
Filed:
Jul. 10, 2018
Zhejiang Huahai Pharmaceutical Co., Ltd, Zhejiang, CN;
Tan Xiao, Zhejiang, CN;
Tianpei Huang, Zhejiang, CN;
Jinsheng Lin, Zhejiang, CN;
Qiang Zhou, Zhejiang, CN;
Tong Wu, Zhejiang, CN;
Danfeng Ye, Zhejiang, CN;
Hong Cai, Zhejiang, CN;
Wenquan Zhu, Zhejiang, CN;
Wenbin Chen, Zhejiang, CN;
Min Li, Zhejiang, CN;
ZHEJIANG HUAHAI PHARMACEUTICAL CO., LTD, Zhejiang, CN;
Abstract
Disclosed is a detection method for N-nitrosodimethylamine (NDMA) impurities, comprising: (1) obtaining a test solution containing a sample to be tested; and (2) detecting the test solution by means of gas chromatography-mass spectrometry to determine the content of an N-nitrosodimethylamine impurity in the sample. The method provided in the present invention has a good separating effect, a wide linear range, a high sensitivity and a good method durability, and can detect the content of N-nitrosodimethylamine (NDMA) in the sample rapidly and effectively.