Mass-Spectrometric Observation of Gaseous Species Evolved in a Vacuum System by Solid-State Electrolysis

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Abstract
The electrolysis of small crystals of CaF2, MgF2, and NaCl has been observed in a high-vacuum system by monitoring the gaseous species evolved with a quadrupole residual gas analyzer. As would be expected the nature of the evolved species is determined by the electrode material. When CaF2 was electrolyzed using carbon electrodes, as many as 20 different carbon fluorides were observed. Atomic fluorine was also generated. The simplicity of the apparatus and the substantial quantity of gas evolved suggest that this technique might be useful for admitting small quantities of unusual and/or reactive gaseous species to a vacuum system in an easily controllable manner.

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