In this work, an amperometric biosensor for lactate determination based on a Sonogel-Carbon transducer has been developed and evaluated using the lactate oxidase enzyme coated with a multipolymer layer as a bioreceptor. The biosensor obtained had adequate sensitivity (4.16 x 10-8 A mM-1) and a wide linear working range (0.2-20 mM) that allowed the determination of lactate at high concentrations without showing enzyme saturation phenomena. The selectivity of the biosensor was also verified using interferents commonly observed in physiological samples. Moreover, a microfluidic cell was designed and fabricated to allow the determination of lactate with the proposed biosensor in a continuous regime. In the end, the viability of the biosensor was tested with the proposed flow system using synthetic samples, obtaining excellent results.
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Innovative multipolymer-based electrochemical biosensor built on a Sonogel-Carbon electrode aiming for continuous and real time lactate determination in physiological samples: a new scenario to exploit additive printing
Published:
26 September 2023
by MDPI
in The 2nd International Electronic Conference on Chemical Sensors and Analytical Chemistry
session (Bio)chemical Sensing
Abstract:
Keywords: Lactate biosensor; Sonogel-Carbon; Gold sono-nanoparticles; Microfluidic cell; 3D printing