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A flexible 1 mm catheter based binary amperometric lactate/oxygen detection system

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3 Author(s)
Li Wang, D. ; Dept. of Chem. Eng., Texas Univ., Austin, TX, USA ; Young, A.W. ; Heller, A.

The authors report on a miniature, flexible catheter based system, with lactate and oxygen sensors, connected to a small bipotentiostat. The lactate sensor is made of polished tips of an array of epoxy embedded carbon fibers. The oxygen sensor is Clark-type. The steady-state lactate electrooxidation current density was 0.3 mA cm/sup -2/ at 2 mM lactate concentration. The lactate sensitivity was 30 mA cm/sup -2/ M/sup -1/. The variation in lactate dependent current under N/sub 2/ and under air was only 2.6%. The oxygen electrode's current was not affected by lactate concentration. The 6"*3"*2", 5 oz, bipotentiostat developed for control and monitoring the electrodes has a linear response to current inputs over six orders of magnitude from 10 pA to 10 mu A.<>

Published in:

Solid-State Sensor and Actuator Workshop, 1992. 5th Technical Digest., IEEE

Date of Conference:

22-25 June 1992