Abstract
ABSTRACT Introduction: Biometric sweat monitoring is an important tool for optimizing sports training. The possibility of developing a wearable amperometric lactate biosensor using a screen-printed carbon electrode (SPCE) impregnated by Ag nanoparticles (Ag NPs) for sweat determination in sports monitoring is questioned. Objective: To develop a sensor with GCE substrate coated on Ag NPs/SPCE. Methods: FESEM and XRD analysis were used for the morphological and structural characterizations of Ag and SPCE NPs, respectively. Results: FESEM, EDS, and XRD revealed that Ag NPs were uniformly dispersed in SPCE. The electrochemical biosensor responded linearly to lactate in phosphate buffer solutions, with detection and sensitivity limits of 1.2 µM and 14.2 mAcm-2 mM-1, respectively. Conclusion: The results suggest that Ag NPs/SPCE can be used to continuously monitor lactate levels in sweat as a practical and reliable biosensor for use. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.
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