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APPARATUS AND METHOD FOR MEASURING CONDUCTIVITY CHANGE IN A GLUCOSE-GLUCOSE OXIDASE REACTION

  • US 3,839,154 A
  • Filed: 08/20/1973
  • Issued: 10/01/1974
  • Est. Priority Date: 08/20/1973
  • Status: Expired due to Term
First Claim
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1. AN APPARATUS FOR MONITORING THE ELECTRICAL CONDUCTIVITY OF A SOLUTION CONTAINING THE PRODUCTS OF A GLUCOSE-GLUCOSE OXIDASE REACTION COMPRISING IN COMBINATION:

  • A. FIRST AND SECOND FLOW-THROUGH CELLS, EACH CELL HAVING A CHAMBER THROUGH WHICH AN IONIC SOLUTION CAN FLOW AND A PAIR OF ELECTRODLES EXPOSED TO THE CHAMBER AND ADAPTED TO MEASURE THE ELECTRICAL CONDUCTIVITY OF AN IONIC SOLUTION WITHIN THE CHAMBER;

    B. A FLOW-THROUGH CONTAINER CONTAINING AN ENZYME COMPOSITE COMPRISING GLUCOSE OXIDASE AND CATALASE IMOBILIZED WITHIN THE PORES OF POROUS, ESSENTIALLY WATER-INSOLUBLE INORGANIC CARRIER PARTICLES HAVING AN AVERAGE PORE DIAMETER BETWEEN ABOUT 220A AND 985A AND AN AVERAGE PARTICLE SIZE BETWEEN ABOUT 25 AND 80 MESH, U.S. STANDARD SIEVE;

    C. MEANS FOR INTRODUCING A GLUCOSE-CONTAINING SOLUTION INTO THE CONTAINER OF (B) AND MEANS FOR COLLECTING THE SOLUTION AFTER PASSAGE THROUGH THE CONTAINER OF (B) AND PASSING THE COLLECTED SOLUTION THROUGH THE FIRST FLOWTHROUGH CELL;

    D. MELANS FOR MEASURING THE ELECTRICAL CONDUCTIVITY OF A SOLUTION WITHIN THE FIRST CELL;

    E. MEANS FOR PASSING EITHER A STANDARD GLUCOSE SOLUTION OR THE GLUCOSE-CONTAINING SOLUTION PRIOR TO PASSAGE THROUGH THE CONTAINER OF (B) THROUGH THE SECOND CELL AND MEASURING THE ELECTRICAL CONDUCTIVITY OF EITHER SUCH SOLUTIONS WITHIN THE SECOND CELL;

    AND, F. MEANS FOR MEASURING THE DIFFERENCE IN ELECTRICAL CONDUCTIVITY BETWEEN THE FIRST AND SECOND CELL.

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