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A Simplified Hydrogen Electrode Vessel

From the Antitoxin and Vaccine Laboratory, Department of Public Health of the Commonwealth of Massachusetts, Boston

Abstract

An attempt has been made to construct a hydrogen electrodevessel so as to permit rapid and accurate determinations ofhydrogen ion concentration in solutions of such character thatthe presence or absence of dissolved C0₂ is of minor importance.

The main chamber, A, of the vessel¹ is made from a piece ofglass tubing 40 to 50 mm. in diameter. The total capacity ofthe vessel is about 50 cc. At one end the vessel is drawn downas indicated in the diagram and fused to a three way stopcock,B, whose stopper has a bore at least 3 mm. in diameter. Thetwo other tubes, C and D, of the stopcock serve as waste andconnecting tubes respectively. The hydrogen electrode, E, isessentially of the same design as that used by Bunker (1). Theinner tube of the electrode is held equidistant from the wall ofthe outer tube by two sets of three tiny glass beads, F, fusedto the outer wall of the inner tube at different levels.