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This study reports the identification of volatile organic compounds (VOCs) and the phenolic composition for these medicinal plants: lemon balm (Melissa officinalis), lavender (Lavandula angustifolia), and elderflower (Sambucus nigra).The HS-SPME-GC-MS hyphenated technique was used to investigate the volatiles from the three plants in fresh and dried forms.The essential oils were obtained by hydrodistillation technique, followed by GC-MS analysis.Additionally, HPLC-UV/VIS detection was used to identify the phenolic compounds of these plants.The majority compounds identified in the fresh, dried and oil of lemon balm were Z-beta-ocimene, citronellal, citronellol, b-caryophyllene, (E)-citral, (Z)-citral and geraniol respectively.The aerial part of lavender contains mainly linalool, linalyl acetate, beta-myrcene, trans-betaocimene, lavandulyl acetate and caryophyllene.The most compounds identified in the fresh flowers of elderflower were linalool, cis-beta-ocimene, linalool oxide (II) pyran, cis-3-hexenyl isovalerate, while in the dry flowers the majority compounds were linalool oxide (II) pyran, cis-3-hexenyl isovalerate and hexenyl tiglate.The essential oil was rich in n-hexadecanoic acid, linoleic acid, and heneicosane.Majority phenolic compounds identified in the analysed species were vanillic, sinapic, ferulic, and p-coumaric acids, while the predominant flavonoids were rutin, quercetin and epicatechin.The profile of VOCs represents an indicator in the valorisation of medicinal plants.
Ciotlăuș et al. (Sat,) studied this question.