A new ultra -low-cost telemetric system for a rapid electrochemical detection of vitamin c in fresh orange juice and other natural products. (Abstract/Poster in atti di convegno)

Type
Label
  • A new ultra -low-cost telemetric system for a rapid electrochemical detection of vitamin c in fresh orange juice and other natural products. (Abstract/Poster in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Barberis A., Bazzu G., Calia G., Rocchitta G., Migheli R., Schirra M. and Serra P.A. (2009)
    A new ultra -low-cost telemetric system for a rapid electrochemical detection of vitamin c in fresh orange juice and other natural products.
    in ‘Piante officinali in medicina: limiti, falsi limiti e sostenibilità nell'uso’, Alghero, 8-9 ottobre 2009
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Barberis A., Bazzu G., Calia G., Rocchitta G., Migheli R., Schirra M. and Serra P.A. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • Ascorbic acid (AA, Vitamin C) is one of the principal nutrients in several fruits (citrus, berries, kiwifruits etc.) and vegetables (tomatoes, cabbages, broccoli, potatoes etc.). It is a water-soluble antioxidant which plays a key role in the human metabolism, helping to prevent many diseases, like cancer, diabetes mellitus, stroke and Parkinson’s Disease, linked to oxidative stress. Citrus fruits are particularly rich in ascorbic acid, but its content is highly susceptible to change during postharvest processing and storage thus influencing the quality of fresh products, their derived juices or other by-products. Due to the importance of this analyte, the determination of ascorbic acid in food products, natural or transformed, has a great significance. A large number of methods of analysis have been applied to fruits, vegetables, biological fluids and pharmaceuticals. They are usually based on spectrophotometric and non-spectrophotometric techniques among which the titrimetric and chromatographic ones are the most commonly used. The application of sensors and biosensors technology to food industry, as a powerful alternative to conventional analytical techniques, has been widely discussed by several authors. All the above-mentioned systems implicate a certain degree of complexity in the phase of sample preparation and/or in the electrode modification. In this study we present a new ultra low-cost system, constituted by an amperometric microsensor connected with a telemetric device, for online detection of Vitamin C in fresh orange juice.The sensor assembly is composed by three rod carbon electrodes (OD 0.3mm) coated with an insulating thin layer of epoxy resin. The in-vitro calibration of the microsensor was carried out in fresh acetate buffer (AB) at room temperature (~23°C). A constant potential of +120 mV vs carbon was applied and, after a stable baseline was reached, known amount of AA stock solution were added to the AB in order to obtain concentrations comprised between 0 and 0.1 mM in cell. The linear response of the system was excellent ranging from 0 to 5 mM of AA (r2 = 0.998, n=8) after correction of the dilution factor. The AA concentration of the fresh orange juice was calculated in the same manner by adding low volumes of sample into the AB solution. Verification of the results was carried out by measuring the AA content of the samples using both titrimetric and chromatographic methods.This new experimental approach, based on simple and inexpensive components, could be used as a rapid and reliable model for determination of ascorbic acid and it seems appropriate for a large scale commercial use. The newly-introduced telemetric system allows the complete suppression of wires with the reduction of triboelectric noise and the increase of S/N ratio. Moreover, several units can be connected at the same time resulting in an expandable and upgradable telemetric NET. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR Istituto di Scienze delle Produzioni Alimentari, Sassari Dip. Neuroscienze e Scienze Materno Infantili- Sez. Farmacologia Università di Sassari (literal)
Titolo
  • A new ultra -low-cost telemetric system for a rapid electrochemical detection of vitamin c in fresh orange juice and other natural products. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
data.CNR.it