Preliminary Study of the Effects of Pulsed Electric Field (PEF) Treatments in Wines Obtained from Early-Harvested Sangiovese Grapes
Open Access
- 18 May 2020
- Vol. 6 (2), 34
- https://doi.org/10.3390/beverages6020034
Abstract
In this experiment, the effect of pulsed electric field (PEF) technology on the extractability of anthocyanins and polyphenols in early-harvested Sangiovese red grapes (16.9°Bx sugar, 3.26 pH, and 10.4 g/L titratable acidity) from Emilia Romagna (Italy) was investigated. Electric field strengths were in the range of 0.9–3 kV/cm, generated by the application of short, high-voltage pulses, and the grapes were subjected to specific energies from 10.4 to 32.5 kJ/kg immediately after crushing and destemming to produce a pre-fermentative pulsed electric field treatment on a pilot scale. Grape musts and wines were analyzed for color components and polyphenols content from pressing of juices up to 3 months from the end of the fermentation of wines. Furthermore, the freshly-fermented wines were subjected to accelerated aging conditions (i.e., warming under 40 °C for 32 days) to simulate the evolution of color parameters with time. The color intensity was generally higher in treated musts and wines compared to the control, further increased by raising the intensity of the electric field. Results suggested the potentialities of pulsed electric fields (PEFs) as a mild pre-fermentative process to assist maceration and to increase the polyphenolic content of musts obtained by early-harvested Sangiovese grapes.Keywords
This publication has 38 references indexed in Scilit:
- Ultrasound assisted extraction of phenolic compounds from grapesAnalytica Chimica Acta, 2012
- Earlier wine-grape ripening driven by climatic warming and drying and management practicesNature Climate Change, 2012
- Enhanced Extraction of Phenolic Compounds from Merlot Grapes by Pulsed Electric Field TreatmentAmerican Journal of Enology and Viticulture, 2012
- Potential applications of PEF to improve red wine qualityTrends in Food Science & Technology, 2010
- Conformation changes of polyphenol oxidase and lipoxygenase induced by PEF treatmentJournal of Applied Electrochemistry, 2009
- Review: Potential of High Hydrostatic Pressure and Pulsed Electric Fields for Energy Efficient and Environmentally Friendly Food ProcessingFood Reviews International, 2006
- A fully automated method for in real time determination of laccase activity in winesAnalytica Chimica Acta, 2005
- Effects of different enzymatic maceration treatments on enhancement of anthocyanins and other phenolics in black currant juiceInnovative Food Science & Emerging Technologies, 2004
- A review of potassium nutrition in grapevines with special emphasis on berry accumulationAustralian Journal of Grape and Wine Research, 2003
- Charge equilibria and pKa of malvidin-3-glucoside by electrophoresisAnalytical Biochemistry, 2003