| CPC G01N 30/64 (2013.01) [G01N 27/301 (2013.01); G01N 27/302 (2013.01); G01N 2030/027 (2013.01)] | 23 Claims |

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1. A disposable electrically insulating substrate surface comprising a platinum hydrogen reference electrode system structure, wherein the platinum hydrogen reference electrode system comprises an electrically conductive and electrochemically active platinum hydrogen reference electrode system region bound as a layer, directly or indirectly, to said substrate surface, wherein the thickness of the reference electrode system structure, the working electrode structure and/or the counter electrode structure is from about 100 A to about 30,000 A thick.
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