The Dow Chemical Company

Steven M Lefkowitz

Steven P Webb

Michael S Paquette

Mary Anne Leugers

Ray W Chrisman

Patrick W Langvardt

Steven J Brownell

Patrick E Kastl

Deborah C Helmer

A sensor and a method for using the sensor to determine the concentration or partial pressure of oxygen in a fluid media is provided. The sensor includes a light modifying medium containing a luminescent dye which is accessible to oxygen. The luminescent dye contains a hexanuclear core of molybdenum, tungsten or mixtures thereof having 14 coordination sites, wherein each site is occupied by a ligand. The sensor also includes an apparatus capable of transmitting and collecting light to and from the light modifying medium.

Apparatus and method for measuring the concentration or partial pressure

The invention is an optical sensor useful for the detection of ionizing radiation emitted from an analyte in a fluid. The sensor is composed of a permeable scintillator having a high surface area to scintillator volume ratio and an optical waveguide located in working relation to the scintillator to collect light photons generated in response to an ionizing radiation source. The sensor is especially useful for biomedical applications. Increased sensitivity allows for miniaturization and implantation in a blood vessel of a small experimental animal.

Miniaturized sensor for ionizing radiation

A sensor and a method for determining the concentration or the partial pressure of oxygen comprising:

Method for measuring the concentration or partial pressure of oxygen

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Walnut Creek, CA, United States of America

Steven M Lefkowitz