Patent ID: 6793789
Filing Date: 2004-09-21
Classification: G01N

Abstract:
A reference electrode comprising:a polymeric reference electrode membrane comprising (a) one selected from a cellulose based porous polymer and a hydrophilic plasticizer and (b) a lipophilic polymer, wherein the hydrophilic plasticizer is selected from the group consisting of glycerol, polyethylene glycol, ethylene glycol monomethyl ether, ethylene glycol, formamide and a combination thereof; an inner reference electrode 3 positioned at the center within the reference electrode; and an inner reference electrolyte 7 filling the internal space of the reference electrode; wherein the polymeric reference electrode membrane 8 is mounted to an end of the electrode, wherein the inner reference electrolyte 7 is a hydrogel obtained by dissolving 1-15% by weight of a hydrophilic polymer in 0.01-3.0 M aqueous solution saturated with a salt selected from the group consisting of KCl, NaCl, KNO3 and NH4NO3, each of which is similar in mobility.