Gold screen-printed electrodes coated with thin films of layered double hydroxides containing cobalt and aluminium (Co1.57Al(OH)xSO4, shortened as CoAl) have been investigated for the design of an electrochemical tyrosinase-based biosensor used for the detection of a complex mixture of polyphenols extracted from green tea. Physicochemical analyses show that the resulted biosensor exhibits very attractive characteristics: a high sensitivity, a large dynamic range (up to 1000 ng.mL-1), and very low limits of detection (0.33 pg.mL-1and 0.03 pg.mL-1for oxidation and reduction, respectively).
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Soussou et al. (2017) studied this question.
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