G - Physics – 01 – N
Patent
G - Physics
01
N
137/108, 150/24,
G01N 31/16 (2006.01) G01N 27/44 (2006.01)
Patent
CA 1071078
Abstract of the Disclosure An automatic titration system and method in which the titrant is generated electrolytically and a two-position slider type ceramic sample valve, reliably, accurately and repetitively obtains a volumetric sample from a process loop and introduces it to a titration cell containing a generator or working compartment and an auxiliary compartment separated by a porous frit. The system also includes a two-position slider type ceramic reagent valve for introducing reagent into the titration cell. Titrant created at a generator electrode surface is dispersed into the bulk of the solution by a magnetically coupled impeller in the working compartment which mixs and also pumps the contents of the cell through the reagent and sample valves in a closed loop. Generator and auxiliary electrodes are connected to a current source which provides the electrolysis current. The progress of the titra- tion is monitored by indicating and reference electrodes in the titration cell connected to an appropriate endpoint indicator, output of which is com- pared to a known set point corresponding to the titration endpoint. The total charge delivered to the generator and auxiliary electrodes during titration is measured by a time or integrator and read out as a trend output signal. The automatic titration system and method of this invention advantageously lends itself to microprocessor control over the titration reaction and titra- tor sequencing, and thus finds application in on-stream process monitoring and control systems.
262892
Earle William E.
Fletcher Kenneth S. (iii)
Weiner Jay M.
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