Natural deep eutectic solvent as tool for improving Rosa canina L. polyphenol recovery in maceration

Rosa canina L. extracts were prepared using water or three natural deep eutectic solvents (NADESs: betaine+malic acid, betaine+sucrose, and citric acid+sucrose with 50% of water) maceration. The characterized in terms total polyphenol content (TPC), ABTS radical scavenging potential, extraction yield, zeta conductivity, pH, density, surface tension, viscosity. TPC was the highest acid extract (10.4 mg gallic equivalents, GAE/g), lowest (6.5 6.4 GAE/g, respectively). potential extract, 5.6 mmol Trolox/g, whereas 2.6 Trolox/g. Extraction yield for 0.607 %, statistically significantly higher betaine+sucrose 1.22 %. Zeta (absolute value) (-2.12 mV), (0.29 mV). Conductivity range 0.25 mS/cm (betaine+sucrose extract) to 5.46 (betaine+malic extract). pH ranged from 3.0 4.5 extracts. Density varied 1.00 g/mL 1.19 while tension 35.0 mN/m 40.6 extract. Viscosity 1.52 mPa·s it 10.67 mPa·s. application NADESs as an medium can improve recovery rose hips, well but depending on NADES composition. Namely, conductivity measured possesses yield. Thus, constitution should be optimized future