Evaluation of the Effect of Different Extraction Techniques on Sour Cherry Pomace Phenolic Content and Antioxidant Activity and Determination of Phenolic Compounds by FTIR and HPLC


Okur İ. , Baltacioglu C., AĞÇAM E., Baltacioglu H., ALPAS H.

WASTE AND BIOMASS VALORIZATION, cilt.10, ss.3545-3555, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 10 Konu: 12
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1007/s12649-019-00771-1
  • Dergi Adı: WASTE AND BIOMASS VALORIZATION
  • Sayfa Sayıları: ss.3545-3555

Özet

Sour cherry pomace derived from mashed cherries that maintains the color and beneficial properties of the cherries (Prunus cerasus L.). In this study, microwave-assisted extraction (MAE) (900 W for 30, 60 and 90 s.), high hydrostatic pressure (HHP) (400 and 500 MPa for 1, 5 and 10 min at 20 degrees C) and ultrasonic-assisted extraction (UAE) (for 5,10 and 15 min with a power of 100%) was used as novel processes. Total phenolic content (TPC), morphological changes, antioxidant activity (AA) and structural changes of cherry pomace were measured by the Folin-Ciocalteu assay, high performance liquid chromatography (HPLC), DPPH-scavenging activity, scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FTIR). According to the results, all novel technologies (MAE-HHP-UAE) increase PC and AA with respect to conventional solvent extraction method (50 degrees C and 30 min) (CSE). Among novel technologies, MAE (90 s) had highest TPC (275.31 +/- 4.26 GAE/100 g FW) and also had highest antioxidant activity (89.9 +/- 0.22%). The lowest TPC and AA values were 108.36 +/- 3.99 mg gallic acid equivalent (GAE)/100 g fresh weight (FW) and 71.30 +/- 1.21% in CSE, respectively. According to FTIR results, there are no significant structural changes in samples when different extraction techniques were applied. Individual phenolics were quantified by using HPLC for different extraction techniques. Graphic