It has been found by Collie and Patterson that, after the passage of the electric discharge through pure hydrogen in a vacuum tube at low pressure, small quantities of helium and neon could be detected in the gas pumped out of the discharge tube. These gases were shown not to be present in the hydrogen which was let into the discharge tube. They must, then, either originate from—(i) occlusion of air in the glass or electrodes, or (ii) from the outer air during the experiment or the subsequent analysis, or (iii) be actually formed by some transmutation process due to the action of the discharge. In the latter case the seat of the effect of the discharge may be at the solid electrode, glass walls, or in the gas itself. The experiments of the above authors appear to show that:— (i) The gas did not originate from occlusion in the electrodes or glass walls, because these gave no such rare gases on solution and subsequent analysis of the gases.
EC3.4 - Development of a Combined pH- and Redox-Sensitive Bi- Electrode Glass Thin-Film Sensor