Abstract: According to one embodiment, a system includes an electrochemical cell that includes a crucible having a molten CaCO3:CaCl2:CaO mixture therein, where a cathode and an inert anode are positioned in the molten CaCO3:CaCl2:CaO mixture, and an inlet for feeding carbon dioxide gas into the molten CaCO3:CaCl2:CaO mixture. In addition, the system includes a furnace having an inert atmosphere therein, where the electrochemical cell is sealed in the furnace having the inert atmosphere.

Abstract: A method of making an electroanalytical measurement including providing a glass-fused working electrode that includes a tungsten rod and a glass coating fused to the rod to form a leak-proof seal, which defines a fixed working electrode area; inserting the electrode into a molten salt such that the fixed working electrode area is completely submerged and a portion of the glass coating is in contact with the molten salt; applying a potential to the molten salt; measuring current as a function of potential; and quantifying a concentration of an analyte.