Method and apparatus for electrolytically determining a species in a fluid

• US 3,260,656 A
• Filed: 09/27/1962
• Issued: 07/12/1966
• Est. Priority Date: 09/27/1962
• Status: Expired due to Term

• Current Assignee: James W. Ross Jr
• Original Assignee: James W. Ross Jr
• Inventors: Ross, James W. Jr.
• Application Number:
  US04/226,533
• Time in Patent Office: 1,384 Days
• US Class Current: 205/783
• CPC Class Codes: G01N 27/404 Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid , e.g. Clark-type oxygen sensors

Claims

18. METHOD OF MEASURING THE CONCENTRATION OF AN ELECTROCHEMICALLY ACTIVE GAS IN A FLUID COMPRISING THE STEPS OF:

PROVIDING A BODY OF ELECTROLYTIC MEDIUM FROM WHICH SAID GAS CAN BE ELECTROLYTICALLY GENERATED;

DIFFUSING SAID GAS BETWEEN SAID FLUID AND SAID MEDIUM THROUGH BARRIER MEANS SELECTIVELY PERMEABLE TO SAID GAS, AND IMPERMEABLE TO BOTH SAID MEDIUM AND FLUID;

IMPRESSING A FIRST POTENTIAL ON A FIRST ELECTROCHEMICALLLY INERT METAL ELECTRODE IMMERSED IN SAID MEDIUM AND A SECOND POTENTIAL ON A SECOND ELECTROCHEMICALLY INERT METAL ELECTRODE IMMERSED IN SAID MEDIUM SO AS TO CAUSE A FLOW CURRENT AT SAID ELECTRODES;

POSITIONING SAID ELECTRODES IN SPACED RELATION TO ONE ANOTHER AND TO SAID BARRIER MEANS, AND MAINTAINING SAID POTENTIALS AT MAGNITUDE AND VALUES AT WHICH SAID