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Title

A new method for microwave assisted ethanolic extraction of Mentha rotundifolia bioactive terpenoids

AuthorsGarcía-Sarrió, María Jesús; Sanz, M. Luz ; Sanz, Jesús; González-Coloma, Azucena ; Soria, Ana C.
KeywordsGas chromatography-mass spectrometry
Mentha rotundifolia
Microwave assisted extraction
Terpenoids
Issue Date2018
PublisherJohn Wiley & Sons
CitationElectrophoresis 39: 1957-1965 (2018)
AbstractA new microwave-assisted extraction (MAE) method using ethanol as solvent has been optimized by means of a Box-Behnken experimental design for the enhanced extraction of bioactive terpenoids from Mentha rotundifolia leaves; 100°C, 5 min, 1.125 g dry sample: 10 mL solvent and a single extraction cycle were selected as optimal conditions. Improved performance of MAE method in terms of extraction yield and/or reproducibility over conventional solid-liquid extraction and ultrasound assisted extraction was also previously assessed. A comprehensive characterization of MAE extracts was carried out by GC-MS. A total of 46 compounds, mostly terpenoids, were identified; piperitenone oxide and piperitenone were the major compounds determined. Several neophytadiene isomers were also detected for the first time in MAE extracts. Different procedures (solid-phase extraction and activated charcoal (AC) treatment) were also evaluated for clean-up of MAE extracts, with AC providing the highest enrichment in bioactive terpenoids. Finally, the MAE method here developed is shown as a green, fast, efficient and reproducible liquid extraction methodology to obtain M. rotundifolia bioactive extracts for further application, among others, as food preservatives.
Publisher version (URL)http://dx.doi.org/10.1002/elps.201800115
URIhttp://hdl.handle.net/10261/172419
Identifiersdoi: 10.1002/elps.201800115
issn: 0173-0835
e-issn: 1522-2683
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