Electricity: measuring and testing – Determining nonelectric properties by measuring electric... – Semiconductors for nonelectrical property
Patent
1988-05-25
1991-03-19
Wieder, Kenneth
Electricity: measuring and testing
Determining nonelectric properties by measuring electric...
Semiconductors for nonelectrical property
324 711, 324425, 422 64, 422 72, 422102, 204406, 204412, 204416, G01N 27414, G01N 27417, G01N 2101
Patent
active
050014170
ABSTRACT:
Apparatus for measuring electrolyute concentrations in fluid samples. The apparatus includes an ion selective electrode having a plurality of ion selective detection sites. Each site has an affinity for a preselected electrolyte of interest and generates a potential having a magnitude related to the concentration of the corresponding electrolyte in the sample. A voltage to optical transducer circuit is provided to convert the voltage differentials to optical signals having intensity related to the concentration of the electrolytes in a first embodiment, a digital code related to the concentration of the electrolytes in a second embodiment, and an optical absorption or density value related to the concentration of the electrolytes in a third embodiment. The optical signals are suitable for detection by conventional optical detector apparatus of assay instruments and may be processed using conventional two point linear interpolation techniques to determine the concentrations of the preselected electrolytes.
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Clark Frederic L.
Davis Charles L.
Durley, III Benton A.
Garrett Paul E.
Pumphery John G.
Abbott Laboratories
Collins Daniel W.
Cornell John W.
Harvey Jack B.
Schmidt Richard D.
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