The hydrogen electrode is shown to serve as an adequate and convenient anode in polarographic work. The fact that the potential of the anode may be changed at will to potentials between Eh 0 and -0.8 by simply adjusting the pH of the hydrogen electrode solution makes it possible to change the applied voltage to values that will give the optimum definition and separation of polarographic waves.Some improvements of the Sargent type of polarograph are suggested.
INPOLAROGRAPHIC work the position and height of each wave on the current-voltage curve are usually determined (9).The maximum clarity of these waves can be obtained by adjusting the voltage to make the relation of the scale of abscissas (voltages) to ordinates (amperes) such that the waves are properly accentuated in form and location. In this paper it is shown