Chemical characterization of Lavandula dentata L. essential oils grown in Uberaba-MG

ABSTRACT: The essential oils of the different parts of Lavandula dentata L. (inflorescences and aerial part without inflorescences) collected in the city of Uberaba (minas Gerais State)were obtained by hydro distillation, and their chemical composition was determined by gas chromatography coupled to mass spectrometry and compared to the chemical composition of essential oil of Lavandula hybrida and Lavandula officinalis. It was observed that the essential oils of the studied species have varied chemical composition and are composed mainly of monoterpenes. The essential oils of L. hybrida and L. officinalis showed a higher concentration of linalool and linaline acetate, while L. dentata L. presented higher concentration of fenchone, eucalyptol and camphor. Results indicate that the essential oil composition of L. dentata L. grown in Uberaba is similar to those produced in Curitiba - PR, providing a promising perspective for the cultivation and extraction of essential oils of this species in Minas Gerais.

摘要：本研究对采自巴西米纳斯吉拉斯州乌贝拉图巴市的齿叶薰衣草（Lavandula dentata L.）不同部位（花序及去花序地上部分）的精油采用水蒸气蒸馏法提取，通过气相色谱-质谱联用法测定其化学成分，并与杂交薰衣草（Lavandula hybrida）和药用薰衣草（Lavandula officinalis）的精油化学成分开展对比分析。结果显示，三种受试薰衣草的精油化学成分均存在一定差异，且主要成分为单萜类化合物。其中，杂交薰衣草与药用薰衣草的精油中芳樟醇（linalool）和乙酸芳樟酯（linalyl acetate）的含量更高，而齿叶薰衣草精油中葑酮（fenchone）、桉叶素（eucalyptol）与樟脑（camphor）的浓度更为突出。本研究结果表明，在乌贝拉图巴市种植的齿叶薰衣草精油成分与巴西巴拉那州库里提巴产区的同类精油成分相近，这为在米纳斯吉拉斯州推广该物种的种植与精油提取工作提供了可观的应用前景。