THE LEAD AMALGAM LEAD SULFATE ELECTRODE REDESIGNED AND REASSESSED

To make the (Pb)Hg\PbSO4\SO42- electrode really usable and attractive for extensive application to thermodynamic studies, a new, simplified design and a convenient preparative procedure have been introduced, en suring stable amalgams and reproducible electrode potentials. The elec trode so prepared has been exhaustively characterized both thermodynam ically and as a SO42--sensing electrode, in different sulfate solution s, including H2SO4 The past discrepancies of standard potentials-mainl y due to preparation and/or handling problems-are discussed and, for a final resolution of the question, a practical standardization procedu re is proposed.