Rapid Quantification of Antioxidant Capacity in Tea Using Laser-Induced Graphene Electrodes
Nélio I. G. Inoque,
Diele A. G. Araújo,
Débora Machado de Lima
et al.
Abstract:This paper describes a new analytical method based on laser-induced graphene (LIG) electrodes for evaluating antioxidant capacity in tea by quantifying the consumption of the 2,2-diphenyl-2-picrylhydrazyl (DPPH) radical. The LIG electrodes were produced by pyrolysis using a CO 2 infrared laser source (10 electrodes were produced in 5 min). The LIG sensor was coupled to a three-dimensional (3D)-printed batch-injection analysis cell to amperometrically detect the remaining DPPH. The sensing properties included a… Show more
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