New ultralow-cost telemetric system for a rapid electrochemical detection of vitamin C in fresh orange juice.
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.
Barberis
Antonio
A
Institute of Food Sciences, National Research Council, Traversa La Crucca, 3 Regione Baldinca, 07040 Li Punti, Sassari, Italy.
Bazzu
Gianfranco
G
Calia
Giammario
G
Puggioni
Giulia M G
GM
Rocchitta
Gaia G
GG
Migheli
Rossana
R
Schirra
Mario
M
Desole
Maria Speranza
MS
Serra
Pier Andrea
PA
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*
D001205:Ascorbic Acid