Zero waste biorefining of lingonberry (Vaccinium vitis-idaea L.) pomace into functional ingredients by consecutive high pressure and enzyme assisted extractions with green solvents. (30th August 2020)

• Record Type: Journal Article
• Authors: Kitrytė, Vaida; Kavaliauskaitė, Asta; Tamkutė, Laura; Pukalskienė, Milda; Syrpas, Michail; Rimantas Venskutonis, Petras
• Is Part Of: Food chemistry. Volume 322(2020)
• Publication Date: 2020-08-30
• Subjects: Lingonberry pomace -- High-pressure extraction -- Antioxidant capacity -- Anthocyanins -- Proanthocyanidins; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.126767
• Languages: English
• ISSNs: 0308-8146

Abstract

Graphical abstract: Highlights: Lingonberry pomace biorefining process was optimized by multistep extractions. Supercritical carbon dioxide extraction recovered 11.8% of lipophilic substances. Pressurized liquid extraction effectively recovered higher polarity compounds. Pomace oil consisted mainly of α-linolenic and linoleic fatty acids. Polar pomace extracts contained valuable phenolic antioxidants, anthocyanins. Abstract: Due to the lack of innovative valorization strategies, berry pomaces are a poorly utilized as a cheap source of valuable nutrients and phytochemicals. An effective biorefining scheme was developed to recover functional components from lingonberry pomace by consecutive supercritical CO2 (SFE-CO2 ), pressurized liquid (PLE) and enzyme assisted (EAE) extractions. SFE-CO2 at optimized parameters yielded 11.8 g/100 g of lipophilic fraction, containing 43.3 and 37.4% of α-linolenic and linoleic fatty acids, respectively. The combined PLE with ethanol and water additionally recovered 61.8 g/100 g of polar constituents and reduced the antioxidant capacity of starting material by up to 94%. The major portion of the antioxidants (89–94% in different assays), anthocyanins (231 mg/100 g pomace) and proanthocyanidins (15.9 g/100 g pomace) was present in PLE-EtOH extract. Cyanidin-3-galactoside was the major anthocyanin (146.9 mg/100 g). High-pressure fractionation was more efficient for obtaining bioactive pomace constituents as compared with conventional and enzyme-assisted extractions.