Patents Assigned to Chemical Inspection & Testing Institute, Japan
  • Method for preparing liquid chromatographic packing material
    Patent number: 5134110
    Abstract: Packing materials for use in liquid chromatographs are prepared by reacting silica gel or porous glass having silanol groups on the surface thereof with a chemical modifier to chemically attach the chemical modifier to silanol groups on the silica gel or porous glass, and reacting the chemically modified silica gel or porous glass with an end-capping agent in gas phase at 250.degree.-500.degree. C. to chemically attach the end-capping agent to the residual silanol groups on the silica gel or porous glass.
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: July 28, 1992
    Assignee: Chemical Inspection & Testing Institute, Japan
    Inventors: Yoshihisa Sudo, Yasuyo Takahata