Measuring assemblies for the determination of ion concentrations and redox potentials, particularly suitable for carrying out measurements at elevated temperatures

摘要

850,177. Electric tests. INGOLD, W. March 15, 1957 [March 16, 1956], No. 8696/57. Class 37 A half cell said to be suitable for measurements of ph value at temperatures of up to 130‹C. comprises a silver electrode arranged in a vessel and filled with saturated KC1 solution. The electrode is surrounded by a pulverulent mass 3 of particles of silver chloride with a gram size of from 5 to 100 microns. The electrolyte is maintained at the concentration corresponding to the working temperature by dissolving part of the surplus silver chloride so that the potential of the half cell remains constant. The porous mass may be worked up into a porous sintered body surrounding the silver core.