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This work reports on the stability of quasi-reference electrode (QRE) material candidates for use in a NaCl-CaCl2 molten salt eutectic at 823 K in comparison to that of the conventional Ag(I)/Ag reference electrode in a mullite sheath with cyclic voltammetry (CV) and an internal reference of the cerium redox couple (Ce(0)/Ce() via CeCl3 addition). In addition, effects of QRE size, working electrode surface area, and scan rate were investigated for potential QRE candidates. A tungsten rod (1.5 mm) has been determined to be most stable with repeatable results and a long usable life of the QRE materials studied. The stability of the measured current using the tungsten quasi-reference electrode is affected by both scan rate (mV/s) and surface area of the working electrode during the CV technique. In contrast to tungsten, the stability of the platinum wires in this system were considered poor. Silver wire becomes more stable with increasing size.

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