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Valorization of red raspberry ( Rubus idaeus L.) seeds as a source of health beneficial compounds: Extraction by different methods
Author(s) -
Marić Boško,
Abramović Biljana,
Ilić Nebojša,
Krulj Jelena,
Kojić Jovana,
Perović Jelena,
BodrožaSolarov Marija,
Teslić Nemanja
Publication year - 2020
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.14744
Subject(s) - blowing a raspberry , ellagic acid , extraction (chemistry) , chemistry , food science , supercritical fluid extraction , polyphenol , rubus , berry , nutraceutical , supercritical fluid , food industry , chromatography , botany , antioxidant , biology , biochemistry , organic chemistry
Fruit processing by‐product, raspberry ( Rubus idaeus L.) seeds were utilized to obtain health beneficial oils. Cold pressing (CP) and supercritical CO 2 extraction (SFE) were applied to separate oil from seeds. Raspberry seed oils were analyzed in terms of fatty acids (FA) content, tocopherols, and functional quality indices. The residues after extractions were analyzed in terms of free and total ellagic acid content (TEAC). CP provided higher extraction yield than the SFE method. Oils isolated by both methods have a significant amount of ω‐3 FA, even though oil obtained by SFE had slightly higher ω‐3 FA content. Furthermore, oils obtained with both extraction methods exhibited high values of tocopherol content. In terms of ellagic acid content, residues after SFE had higher values of free and TEAC than residues after CP. Practical applications Raspberry seeds are currently underutilized by‐product of the fruit processing industry. These seeds could be further processed to obtain oil with high quantity of essential ω‐3 fatty acid and polyphenol extracts with high content of ellagic acid. Isolated oil and phenolic extracts could be used in various food, cosmetic, and nutraceutical products to increase its nutritive composition and functional properties. Utilization of cold pressing (conventional extraction technique) and supercritical CO 2 extraction (novel and green extraction technique) for oil recovery in the same study enables a direct comparison of these techniques and reveals the advantages and disadvantages of supercritical CO 2 extraction for potential industrial application.