Patents Examined by Long V. Ke
  • Test carrier for the determination of ions
    Patent number: 5211914
    Abstract: The invention concerns a test carrier for the determination of ions containing a test layer which has a liquid-resistant, organic phase which contains a hydrophobic polymer in a homogeneous mixture with a hydrophobic, organic liquid of low volatility and an ionophore, as well as a substance which changes its colour in the presence of the ion to be determined. The test carrier is characterized in that the test layer contains particles with an oil number of 80-200 and the ionophore is homogeneously dispersed in the hydrophobic, organic phase.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: May 18, 1993
    Assignee: Boehringer Mannheim GmbH
    Inventors: Peter Vogel, Detlef Thym, Michael Fritz, Dan Mosoiu