| http://www.w3.org/ns/prov#value | - The electrode comprises an electrically conductive inner element with a salt disposed on a surface portion thereof having as a cation a cation form of the element and also having an anion, a hydrophilic layer in intimate contact with the salt and including a water soluble salt of said anion and a hydrophobic layer in intimate contact with the hydrophilic layer whereby the hydrophilic layer is shie
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