公开(公告)号：US3577332A

公开(公告)日：1971-05-04

申请号：US3577332D

申请日：1967-07-12

Applicant: BECKMAN INSTRUMENTS INC

Inventor： PORTER JOE A ,  COUCH STEUART L

IPC: G01N27/49 ,  G01N27/46

CPC classification number: G01N27/404

Abstract: A CELL FOR POLARGRAPHIC ANALYSIS OF THE TYPE EMPLOYING A PAIR OF ELECTRODES JOINED BY AN ELECTROLYTE AND SEPARATED FROM THE SAMPLE MEDIUM BY A SELECTIVELY PERMEABLE MEMBRANE. PRESSURE COMPENSATION IS PROVIDED FOR THE CELL BY EMPLOYING AN ION IMPERMEABLE BARRIER WHICH CLOSES A PASSAGE LEADING TO THE ELETROLYTE RESERVOIR IN THE CELL SO THAT CONTAMINANTS OUTSIDE OF THE CELL CANNOT REACH THE ELECTROLYTE RESERVOIR. THE BARRIER HAS A SENSITIVITY TO PRESSURE CHANGES GREATER THAN THAT OF THE MEMBRANE SO THAT THE SPACIAL RELATIONSHIP BETWEEN THE MEMBRANE AND THE SENSING ELECTRODE OF THE CELL IS NOT INFLUENCED BY CHANGING PRESSURE CONDITIONS.