Sensor element and method for making the same

Details Sensor element and method for making the same Sensor element and method for making the same

G - Physics

01

N

G01N 21/78 (2006.01) G01N 21/64 (2006.01) G01N 31/22 (2006.01) G01N 33/84 (2006.01) G01N 21/77 (2006.01) A61B 5/14 (1990.01)

Patent

CA 2089709

ABSTRACT OF THE DISCLOSURE A sensor element includes an analyte-permeable matrix which supports and maintains an emulsion of a sensing solution containing an analyte-sensitive indicator substance in a plurality of tiny vesicles. The sensing solution is immiscible with the matrix material, and contains a dye indicator which dissociates into two different species. The sensing solution is initially mixed with an agent which modifies the equilibrium of dissociation of the dye indicator for optimal sensitivity. The liquid matrix preferably includes a curing inhibitor to allow the matrix to remain liquid until applied to a sensing surface, such as the tip of an optical fiber. The sensing solution remains suspended in these homogeneously dispersed vesicles after the matrix solidifies.

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