National Research Development Corporation

Orion Research, Inc.

Orion Research Puerto Rico, Inc.

Lionel S Goldring

James W Ross, Jr

Moshe J Hirshberg

John H Riseman

Mark A Gelo

Electrochemical sensor with solid phase electrolyte

An ion-chromatography system for analyzing one or more ionic species of a given polarity in solution, the system comprising an ion-exchange material reactive with such species, an eluant fluid, means for adding the eluant fluid and ionic species to the separation column, a stripper column and a detector. The eluant fluid includes at least a pair of electrically neutral molecular species reactive with one another to provide ionic constituents, the molecular species being in substantial equilibrium with the ionic constituents. The stripper column is positioned at the outlet of the separation column to receive the eluant fluid from the latter and reduce the concentration of the ionic constituents in the eluant fluid. The stripper column includes a conduit relatively permeable to the neutral molecular species in the eluant and relatively impermeable to the ionic constituents. Means are also provided for removing any of the neutral species that permeate the conduit, whereby a concentration gradient is established across the conduit. The detector is provided to quantitatively measure the chromatographically separated ionic species in the eluant discharged from the stripper column.

Method of and apparatus for chromatographic analysis

An improved electrode for detecting ion concentration and a method of manufacturing such an electrode. The electrode includes concentric glass tubes, including an inner tube which is filled with a filling solution and a larger, outer tube which extends above the level of the filling solution in the inner tube. A metal contact is immersed in the filling solution and extends outside the inner tube through a hermetic seal to allow electrical contact to be made to the filling solution. The inner tube is made of a different glass from the outer tube so that the inner tube will absorb radiation at selected wavelengths which are transmitted by the outer tube. The inner tube is illuminated with radiation of the proper wavelength so that the inner tube melts and collapses around the metal contact to form the hermetic seal. In an alternate embodiment, the electrode has an inner tube which is made of two different types of glass. An apparatus for mechanizing the electrode sealing process is also described.

Fluid electrode and method of making

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Woodbridge, CT, United States of America

Lionel S Goldring