G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
G01N27/28—Electrolytic cell components
G01N27/30—Electrodes, e.g. test electrodes; Half-cells
G01N27/333—Ion-selective electrodes or membranes
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
G01N27/28—Electrolytic cell components
G01N27/30—Electrodes, e.g. test electrodes; Half-cells
G01N27/333—Ion-selective electrodes or membranes
G01N27/3335—Ion-selective electrodes or membranes the membrane containing at least one organic component