Coulometric systems

• US 3,208,926 A
• Filed: 08/25/1960
• Issued: 09/28/1965
• Est. Priority Date: 08/25/1960
• Status: Expired due to Term

• Current Assignee: Edgar L. Eckfeldt
• Original Assignee: Edgar L. Eckfeldt
• Inventors: Eckfeldt, Edgar L.
• Application Number:
  US04/051,968
• Time in Patent Office: 1,860 Days
• US Class Current: 204/406
• CPC Class Codes: G01N 27/423 Coulometry

Claims

1. A COULOMETRIC SYSTEM COMPRISING A CELL HAVING A FIRST LIQUID SPACE FOR A REFERENCE SOLUTION, A REFERENCE ELECTRODE DISPOSED WITHIN SAID LIQUID SPACE, MEANS INCLUDING AN ELECTROLYTICALLY CONDUCTIVE MEMBER FORMING A SECOND LIQUID SPACE INCLUDING A FLOW CHANNEL AND HAVING AN ELECTROLYTIC CONDUCTIVE PATH EXTENDING THROUGH SAID MEMBER, SAID MEMBER BEING DISPOSED WITH ONE FACE EXPOSED TO SAID FIRST LIQUID SPACE AND THE OTHER FACE THEREOF EXPOSED TO SAID SECOND LIQUID SPACE, FLOW CONNECTION FOR FILLING SAID CHANNEL WITH A SAMPLE SOLUTION HAVING A CONSTITUENT HTEREIN TRANSFORMABLE BY ELECTROLYSIS FROM ONE STATE TO A SECOND STATE, SAID FLOW CHANNEL INCLUDING A WORKING ELECTRODE OF LARGE SURFACE AREA MAINTAINED AT A PREDETERMINED POTENTIAL IN CONTACT WITH SAID SAMPLE SOLUTION FOR PRODUCING CHEMICAL REACTIONS WHICH TRANSFORM SAID CONSTITUENT FROM SAID ONE STATE TO SAID SECOND STATE TO THE EXCLUSION OF REACTIONS AT HIGHER POTENTIALS OF OTHER CONSTITUENTS, SAID FLOW CHANNEL HAVING MAXIMUM SOLUTION THICKNESSES WITH RESPECT TO SAID SURFACE AREA OF SAID WORKING ELECTRODE OF ABOUT FIFTEEN-THOUSANDTHS OF AN INCH, AND MEANS INCLUDING CURRENT-RESPONSIVE MEANS CONNECTED TO SAID ELECTRODES FOR MEASURING THE CURRENT FLOW INCIDENT TO CHEMICAL REACTIONS OCCURING AT SAID WORKING ELECTRODE WHICH TRANSFORM SAID CONSTITUENT FROM SAID ONE STATE TO SAID SECOND STATE AS A MEASURE OF THE CONSTITUENT CONTENT OF SAID SAMPLE SOLUTION.