Patent ID: 8187435
Filing Date: 2012-05-29
Classification: G01N

Abstract:
1. A reference electrode, comprising: a liquid electrolyte containing water, a water soluble organic compound with molecular size and boiling point both greater than water, and an ionic salt, wherein the water soluble organic compound is poly(polypropylene glycol) with the average molecular weight of 450; a solid crystal of the ionic salt in the liquid electrolyte; a metal/metal salt complex layer in contact with the liquid electrolyte; a leading wire connected to the metal/metal salt complex layer; an insulation case for containing the liquid electrolyte; and a nano-porous junction material bound to an open end of the insulation case for contacting the liquid electrolyte, wherein the nano-porous junction material has a pore size of about 4 Å and the pore size is greater than the diameter of the cation of the ionic salt but smaller than the average molecular length of the water soluble organic compound.