Patents by Inventor Danfeng YE

Danfeng YE has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Detection method for n-nitrosodimethylamine impurities
    Patent number: 11519890
    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.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: December 6, 2022
    Assignee: ZHEJIANG HUAHAI PHARMACEUTICAL CO., LTD
    Inventors: Tan Xiao, Tianpei Huang, Jinsheng Lin, Qiang Zhou, Tong Wu, Danfeng Ye, Hong Cai, Wenquan Zhu, Wenbin Chen, Min Li
  • DETECTION METHOD FOR N-NITROSODIMETHYLAMINE IMPURITIES
    Publication number: 20210285920
    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.
    Type: Application
    Filed: July 10, 2018
    Publication date: September 16, 2021
    Inventors: Tan XIAO, Tianpei HUANG, Jinsheng LIN, Qiang ZHOU, Tong WU, Danfeng YE, Hong CAI, Wenquan ZHU, Wenbin CHEN, Min LI