Fabian Alperth, Bettina Pogrilz, Astrid Schrammel, Franz Bucar
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引用次数: 0
Abstract
Introduction: Peels are an abundant but still underutilized waste product in the Citrus fruit industry. They contain coumarins with antiadipogenic potential that could be promising targets in new valorization strategies for Citrus peels.
Objectives: In this study, these coumarins, that is, citropten, bergamottin, and 5-geranyloxy-7-methoxycoumarin (5G7MC), were investigated in Citrus limon peels of different commercial varieties by HPLC-DAD after extraction with ethanol and choline chloride-based natural deep eutectic solvents (NADES) as alternative extraction agents in green natural product extraction.
Results: Target coumarins were almost exclusively found in the flavedo (exocarp) peel layer and in whole peel samples, but not in the albedo (mesocarp) layer. Flavedo samples from varieties "Verdelli" (ES) and "Lisbon" (ZA) showed particularly high concentrations in ethanolic extracts. When applying NADES extraction, best results for citropten were achieved with malonic acid, 1,2-propanediol, and citric acid as hydrogen bond donors (HBDs), with higher yields than the reference solvent ethanol. For bergamottin and 5G7MC, promising results were obtained for 1,2-propanediol as HBD, though lower yields than with ethanol. The possible chlorination of coumarin epoxides byakangelicol and oxypeucedanin was recognized for acidic NADES in LC-MS analysis.
Conclusion: Overall, C. limon peels proved to be a relevant starting material for valorization through coumarin extraction with ethanol and NADES.
期刊介绍：
Phytochemical Analysis is devoted to the publication of original articles concerning the development, improvement, validation and/or extension of application of analytical methodology in the plant sciences. The spectrum of coverage is broad, encompassing methods and techniques relevant to the detection (including bio-screening), extraction, separation, purification, identification and quantification of compounds in plant biochemistry, plant cellular and molecular biology, plant biotechnology, the food sciences, agriculture and horticulture. The Journal publishes papers describing significant novelty in the analysis of whole plants (including algae), plant cells, tissues and organs, plant-derived extracts and plant products (including those which have been partially or completely refined for use in the food, agrochemical, pharmaceutical and related industries). All forms of physical, chemical, biochemical, spectroscopic, radiometric, electrometric, chromatographic, metabolomic and chemometric investigations of plant products (monomeric species as well as polymeric molecules such as nucleic acids, proteins, lipids and carbohydrates) are included within the remit of the Journal. Papers dealing with novel methods relating to areas such as data handling/ data mining in plant sciences will also be welcomed.
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