Amperometric l-ascorbic acid biosensors equipped with enzyme micelle membrane

Simultaneous amperometric detection of ascorbic acid and antioxidant capacity in orange, blueberry and kiwi juice, by a telemetric system coupled with a fullerene- or nanotubes-modified ascorbate subtractive biosensor

“…Ascorbate oxidase was largely used for the development of biosensors devoted to AA detection in different matrices: in red and white wines (Campanella et al, 2004;Vig et al, 2010), in commercial fruit juices (Wang et al, 2008), in natural fruit juices and soft drinks (Pisoschi et al, 2010), in fruit juices and vitamin C tablets (Chauhan et al, 2010).…”

An Ascorbic Acid Oxidase-based Sensing Platform for Stereoselective Interaction with Ascorbic Acid and Isoascorbic Acid

“…And the larger peak current value could be observed from IAA. The possible mechanism of this electrochemical phenomenon was raised as follows: After the AO/dpAu/rGO/GCE was immersed in AA or IAA solution, the AA around the electrode could be chemically catalyzed by AO to generate DHA (Scheme 1C), 36,37 which led to a lower amount of AA reaching the electrode surface, 20 so that a lower oxidation peak current was observed on AA. Compared with the dpAu/rGO/GCE, the increased peak current of IAA was observed on the AO/dpAu/ rGO/GCE, hinted that the compatible microenvironment on the selective biointerface was more appropriate to IAA via specific electrostatic or hydrogen bonding sites, 38 so that a greater amount of IAA loading was acquired on the AO/dpAu/rGO/ GCE, derived from the synergistic effect of rGO, dpAu and AO.…”

A novel automated electrochemical ascorbic acid assay in the 24-well microtiter plate format

“…Common strategies include acid-base and redox titrations, fluorometry, photometry and spectroscopy [11][12][13][14][15][16][17][18]. Electrochemical determination of AA is facilitated by the ease of anodic oxidation of the molecule to dehydroascorbic acid (DHAA).…”