Electrolytic coulometer titration system

Abstract

Abstract THE PRESENCE AND CONCENTRATION OF A CONSTITUENT WITHIN EITHER A CONTINUOUS OR DISCONTINUOUS FLOWING SAMPLE, IS DETERMINED BY MEANS OF A COULOMETER TITRATION SYSTEM INCLUDING(I) A TITRATION CELL CONTAINING HYDROGEN SATURATED ELECTROLYTE, SUBJECT TO PRESSURE VARIATIONS, FOR ABSORPTION THE CONSITUENT, OR A QUANTITATIVELY RELATED COMPONENT THEREOF, TO THEREBY CHANGE THE HYDROGEN ION CONCENTRATION (PH) OF THE ELECTROLYTE FROM A PREDETERMINED PH SET POINT LEVEL, (II) POTENTIAL DEVELOPING ELECTRONS DISPOSED IN THE ELECTROLYTE FOR SENSING SAID CHANGE IN HYDROGEN ION CONCENTRATION FROM SAID SET POINT LEVEL BY MEANS OF A VOLTAGE PRODUCED THEREBETWEEN, (III) A PAIR OF GENERATING ELECTRODES FOR ELECTROLYTICALLY PRODUCING, IN THE ELECTROLYTE, IN RESPONSE TO SAID VOLTAGE JUST ENOUGH OF A COMPONENT REACTABLE WITH THE CONSTITUENTS BEING ANALYZED FOR, OR COMPONENT THEREOF. TO NEUTRALIZE THE CONSITUENT OR COMPONENT THEREOF, TO RETURN SAID HYDROGEN ION CONCENTRATION TO ITS PREDETERMINED SET POINT LEVEL, AND (IV) RECORDING MEANS MAINTAINING A CONTINUOUS RECORD OF THE COMPONENT REACTABLE WITH THE SAID CONSTITUENT, OR COMPONENT THEREOF, SO AS TO INDICATE THE PRESENCE AND CONCENTRATION THEREOF WITHIN THE TITRATION CELL. THE PRESENT INVENTION CONTEMPLATES THE USE OF FIRST AND SECOND POTENTIAL ELECTRODES INCLUDING AN IMPROVED HYDROGEN-DISSOLVED-IN-PALLADIUM SENSING ELECTRODE ADAPTED, IN COMBINATION, WITH A REFERENCE ELECTRODE TO EXTEND THE RESPONSE RANGE OF THE SYSTEM TO DETECT LOW CONCENTRATIONS OF THE CONSITUENT BEING ANALYZED FOR, OR COMPONENT THEREOF, BY DAMPENING THE RATE OF CHANGE, WITH TIME, OF A POTENTIAL DEVELOPED BETWEEN THE IMPROVED SENSING ELECTRODE AND THE REFERENCE ELECTRODE DUE TO CHANGES IN HYDROGEN PARTIAL PRESSURE AT THE SURFACE OF THE IMPROVED SENSING ELECTRODE. PREFERABLY, THE IMPROVED SENSING ELECTRODE, HAS A HYDROGEN-PALLADIUM (H/PD) ATOMIS RATIO GREATER THAN 0.003 AND UP OR AND INCLUDING ABOUT .60.

Inventors

• 👤 David R Rhodes

Bibliographic Details