Chamomile Wastes (Matricaria chamomilla): New Source of Polysaccharides
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The chamomile (Matricaria chamomilla) is widely used as essential oil crop. Low amounts of oils in the plants lead to annual generation of significant wastes which are mainly discarded. The purpose of this study was to investigate chamomile wastes as source of polysaccharides as novel approach for valorization of chamomile waste biomass.
Three wastes—generated by industrial steam distillation, hydrodistillation and extraction with 1,1,1,2-tetrafluoroethane of chamomile flowers, were investigated. The potential of wastes as source of polysaccharides was estimated by initial diluted acid extraction. Consecutive fractional extraction of the wastes with different extractants was performed in order to obtain information about the overall polysaccharides content and polysaccharide fractions present in the wastes.
Different fractions of polysaccharides present in the chamomile wastes were extracted for the first time by consecutive fractional extraction. Their chemical composition and properties were investigated and was found that they were pectic type polysaccharides. The polysaccharides were subjected to differential thermal analysis and it was found that they start to decompose significantly after 230–240 °C.
The present study explored the possibility for obtaining of polysaccharides by fractional extraction of chamomile wastes. For the first time also waste from extraction with 1,1,1,2-tetrafluoroethane of chamomile flowers was investigated. The overall yield of polysaccharides from steam-distilled, hydrodistilled wastes and residues after extraction with 1,1,1,2-tetrafluoroethane—11.66, 9.87 and 22.56%, respectively, suggested that waste chamomile biomass was a rich source of pectic type polysaccharides.
KeywordsMatricaria chamomilla Waste valorization Fractional extraction Polysaccharides Pectins
The present investigation was financially supported by the project 6/15-H (University of food technologies – Plovdiv, Bulgaria).
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
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