Effect of the Shape of Ultrasonic Vessels on the Chemical Properties of Extracts from the Fruit of Sorbus aucuparia

The goal of this study was to analyse the effect sonoreactor dimensions on effectiveness ultrasound-assisted extraction (UAE) bioactive substances from rowan (Sorbus aucuparia L.). Sonication carried out with a VC750 Sonics processor at following amplitudes ultrasound: 12, 24, and 36 µm. frequency ultrasound 20 kHz. Extraction conducted in 2 s on–4 off pulse system. total phenolic content antioxidant activity were determined using spectrophotometric method. pH value extracts measured combined metric electrode, type EPS-1 (Elmetron). Response surface methodology (RSM) used optimise investigated variables. On basis developed model, variable values obtained: TPC—12.48 gallic acid equivalent (GAE)/g, 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) values—126.54 μmol Trolox (TE)/g, 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) values—79.58 TE/g, ferric reducing power assay (FRAP) values—120.65 TE/g for an vessel diameter 35 mm TPC—11.68 mg GAE/g, ABTS values—120.49 DPPH values—75.90 FRAP values—155.54 25 mm. Significant influences time, amplitude, alcohol concentration course process tested vessels found. optimum conditions obtained ethyl about 60%, range 30–50%. A very strong positive linear correlation found between both reactors. models pulsed characterised by good predictive capacity (77.49–91.39%) can be obtaining polyphenols rowan.