Patent ID: 8529740

Claim:
An electrochemical apparatus for analyzing a flat substrate, comprising: a disposable rectangular cuvette that comprises four rectangular sides, an open top end, and a bottom end with a hole therethrough, a flat substrate that functions as a working electrode, a gasket surrounding the hole in the bottom end for providing a seal in between the flat substrate that functions as a working electrode and the bottom end of the cuvette, a cell holder comprising a top rectangular plate having a groove that mates with said open top end of the cuvette, said groove defining a perimeter for a plurality of holes through the top plate inside the perimeter, and a bottom rectangular plate for supporting the bottom end of said cuvette, the bottom rectangular plate having four corners and a threaded hole at each corner for receiving a screw or other aligning pin for aligning the top plate with the bottom plate when the groove of the top rectangular plate mates with the open top end of the cuvette, and fastening means for fastening the bottom plate to the top plate, a reference electrode that fits through a hole inside the perimeter of the groove in the top rectangular plate of the cell holder and into the cuvette; and a counter electrode that fits through a hole inside the perimeter of the groove in the top rectangular plate of the cell holder and into the cuvette.