title: New ultralow-cost telemetric system for a rapid electrochemical detection of vitamin C in fresh orange juice.
abstract: Ascorbic acid (AA), one of the principal micronutrients in horticultural crops, plays a key role in the human metabolism, and its determination in food products has a great significance. Citrus fruits are rich in AA, but its content is highly susceptible to change during postharvest processing and storage. We present a new ultralow-cost system, constituted of an amperometric microsensor composed of three rod carbon electrodes connected to a telemetric device, for online detection of AA in orange juice, as an alternative to conventional analytical methods. The in vitro calibration, ranged from 0 to 5 mM, and AA juice content was calculated by adding low volumes of sample into an acetate buffer solution at a constant potential of +120 mV vs carbon pseudoreference. This new approach, which is simple, expandable, and inexpensive, seems appropriate for large scale commercial use.
authors.affiliation: Institute of Food Sciences, National Research Council, Traversa La Crucca, 3 Regione Baldinca, 07040 Li Punti, Sassari, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Barberis
authors.forename: Gianfranco
authors.initials: G
authors.lastname: Bazzu
authors.forename: Giammario
authors.initials: G
authors.lastname: Calia
authors.forename: Giulia M G
authors.initials: GM
authors.lastname: Puggioni
authors.forename: Gaia G
authors.initials: GG
authors.lastname: Rocchitta
authors.forename: Rossana
authors.initials: R
authors.lastname: Migheli
authors.forename: Mario
authors.initials: M
authors.lastname: Schirra
authors.forename: Maria Speranza
authors.initials: MS
authors.lastname: Desole
authors.forename: Pier Andrea
authors.initials: PA
authors.lastname: Serra
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D002138:Calibration; D002957:Citrus / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000191:economics / Q000295:instrumentation*; D004867:Equipment Design; D013686:Telemetry / Q000191:economics / Q000295:instrumentation*
chemical_list: D001205:Ascorbic Acid