Bioactive Compounds from Norway Spruce Bark: Comparison Among Sustainable Extraction Techniques for Potential Food Applications

Foods

Sara Spinelli¹  Amalia Conte¹  Cristina Costa¹  MatteoAlessandro Del Nobile¹  Lucia Padalino¹  Nicola La Porta² 

[1]Department of Agricultural Sciences, Food and Environment, University of Foggia, Via Napoli, 25–71121 Foggia, Italy

[2]Department of Sustainable Agro-ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele all’Adige, Italy

关键词: supercritical fluid extraction;    pressurized liquid extraction;    ultrasound-assisted extraction;    trans-resveratrol;    norway spruce bark;   

DOI  :  10.3390/foods8110524

来源: DOAJ

【 摘 要 】

Picea abies (L.) Karst, (Norway spruce) bark, generally considered as wood industry waste, could potentially be used as a valuable source of antioxidants for food applications. In this study, supercritical fluid extraction (SFE), pressurized liquid extraction (PLE), and ultrasound-assisted extraction (UAE) were carried out in order to recover bioactive compounds from bark of Norway spruce. Obtained results show that PLE with ethanol as solvent was the most effective method for extracting total flavonoid compounds (21.14 ± 1.42 mg quercetin g⁻¹ sample) and consequently exerted the highest antioxidant activity measured by 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (257.11 ± 13.31 mg Trolox g⁻¹ sample). On the other hand, UAE extract contained the maximum phenolic concentration (54.97 ± 2.00 mg gallic acid g⁻¹ sample) and the most interesting antioxidant activity measured by the ferric-reducing antioxidant power (580.25 ± 25.18 µmol FeSO₄ g⁻¹ sample). Additionally, PLE and UAE have demonstrated great efficiency in the extraction of trans-resveratrol, quantified by HPLC (0.19 and 0.29 mg trans-RSV g⁻¹ sample, respectively).

【 授权许可】

Unknown