公开(公告)号：US3706649A

公开(公告)日：1972-12-19

申请号：US3706649D

申请日：1970-06-29

Applicant: BECKMAN INSTRUMENTS INC

Inventor： COSGROVE RICHARD E ,  KRULL IRWIN H ,  MASK CHARLES A

IPC: G01N27/333 ,  G01N27/46

CPC classification number: G01N27/3335 ,  G01N2410/10

Abstract: AN ELECTROCHEMICAL ELECTRODE FOR MEASURING THE ION CONCENTRATION OR ACTIVITY OF SOLUTIONS. THE ION SENSITIVE BARRIER OF THE ELECTRODE CONTAINS A MACROCYCLIC COMPOUND, MINERAL OIL, AND A SUFFICIENT AMOUNT OF A COMPOUND LIPID TO RENDER THE BARRIER SUBSTANTIALLY SOLID. PREFERABLY, AN AROMATIC COMPONENT IS INCLUDED IN THE BARRIER TO PROVIDE LONG TERM STABILITY OF THE BARRIER. THE MACROCYCLIC COMPOUND IS PREFERABLY VALINOMYCIN WHEN THE ELECTRODE IS TO BE UTILIZED FOR SELECTIVELY MEASURING THE POTASSIUM ION ACTIVITY OF SOLUTIONS, AND IS PREFERABLY NONACTIN WHEN THE ELECTRODE IS TO BE UTILIZED FOR SELECTIVELY MEASURING THE AMMONIUM ION ACTIVITY OF SOLUTIONS.