Evaluation of the Effect of Pulsed Electric Field on Coffee Arabica Beans

This study focused on the effect of pulsed electric field (PEF) as a pretreatment on coffee beans. PEF was applied with the specific energies of 1.742, 3.484 and 7.840 kJ/kg to Ethiopian Coffee Arabica beans before and after the roasting process, and beans were further brewed to investigate the effe...

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Bibliographic Details
Published in:Food and bioprocess technology 2022-05, Vol.15 (5), p.1073-1081
Main Authors: Bilge, Gonca, Yurdakul, Merve, Buzrul, Sencer, Bulut, Onur
Format: Article
Language:English
Subjects:
Agriculture
Antioxidants
Beans
Biotechnology
Breweries
Brewing
Caffeine
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Coffee
Electric fields
Fluorescence
Fluorescence recovery after photobleaching
Food processing
Food Science
Maillard reaction
Maillard reaction products
Material requirements planning
Original Research
Phenolic compounds
Phenols
Pretreatment
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Summary:This study focused on the effect of pulsed electric field (PEF) as a pretreatment on coffee beans. PEF was applied with the specific energies of 1.742, 3.484 and 7.840 kJ/kg to Ethiopian Coffee Arabica beans before and after the roasting process, and beans were further brewed to investigate the effect of PEF on extraction yield and formation of Maillard Reaction Products (MRP). Antioxidant activity (DPPH, FRAP and ABTS methods) and total phenolic content (TPC) were determined after the brewing process. UV/Vis, fluorescence and ATR-FTIR spectra of samples were also recorded to evaluate the extraction of phenolic compounds and formation of MRP. It was observed that the PEF treatment increased the extraction of phenolic compounds and antioxidant activity compared to untreated beans up to 24% and 31%, respectively, while reducing the MRP. It was concluded that PEF pretreatment may be a valuable technique for obtaining better extraction yield and caffeine concentration, and lower MRP. Furthermore, application of PEF treatment on green coffee beans showed more promising results.
ISSN:1935-5130
1935-5149
DOI:10.1007/s11947-022-02802-7