Solid State optical potassium sensor using a potential-sensitive dye

Otto S. Wolfbeis; Barna Kovacs; Huarui He

doi:10.1117/12.629398

10 February 1995 Solid State optical potassium sensor using a potential-sensitive dye

Otto S. Wolfbeis, Barna Kovacs, Huarui He

Proceedings Volume 2331, Medical Sensors II and Fiber Optic Sensors; (1995) https://doi.org/10.1117/12.629398
Event: International Symposium on Biomedical Optics Europe '94, 1994, Lille, France

Abstract

In an extension of previous work on optical chemical sensors based on the use of potential- sensitive dyes incorporated in Langmuir-Blodgett films, we now describe solid-state potassium-sensitive membranes. The sensing scheme again is based on the use of valinomycin as the potassium carrier, but a plasticized pvc membrane is being used as a membrane material rather than a Langmuir-Blodgett film. A potential-sensitive dye detects the potential created at the sensor/sample interface. Unlike many other kinds of potassium optrodes, the response function is virtually independent of pH. Potassium can be continuously monitored over the concentration range from 10 - 50 (mu) M up to 10 mM, although relative signal changes do not exceed -20% at present. Membranes are designed in a way that they can be manufactured in large quantities, and the dye is compatible with LED light sources.

Citation Download Citation

Otto S. Wolfbeis, Barna Kovacs, and Huarui He "Solid State optical potassium sensor using a potential-sensitive dye", Proc. SPIE 2331, Medical Sensors II and Fiber Optic Sensors, (10 February 1995); https://doi.org/10.1117/12.629398

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