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ENANTIOMERIC DISTRIBUTION OF TERPENOIDS IN ESSENTIAL OIL OF AMAZONIAN AROMATIC PLANTS BY TRAVELING WAVE ION MOBILITY - MASS SPECTROMETRY

Grant number: 12/07472-2
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): August 01, 2012
Effective date (End): January 31, 2015
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Analytical Chemistry
Principal Investigator:Marcos Nogueira Eberlin
Grantee:Carlos Henrique de Vasconcelos Fidelis
Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

Traveling Wave Ion Mobility Mass Spectrometry (TWIM-MS) is a modern and powerful analytical tool for the characterization of complex samples. While mass spectrometry measures primarily the ratio of mass/charge (m/z) ions, TWIM adds a new dimension to the data providing for each value of m/z a drift of time spectrum, separating the ions in the order of milliseconds, by their cross sections. This technique has been widely used in structural determinations of various classes of compounds in different matrices. However, the versatility and separation power of TWIM-MS has not been used in studies of essential oils (EO). In this project we propose a method for using TWIM-MS to analyze the enantiomeric distribution of linalool in three species of aromatic plants (Aniba rosaeodora, Aniba parviflora and Aniba spp) of economic value and environmental impact. Aniba rosaeodora is an endangered species. Those three species contains linalool in the chemical composition of essential oil which gives them unique fragrance. Obtaining the EO of these species from the leaves is an alternative not only economical, but environmentally sustainable. The ratios between the optical isomers vary with a number of factors, including species, plant organ and age of trees from which the oil is extracted, and climatic and seasonal factors. Within this context, we will study the composition of EO terpenes from Amazonian species, mainly linalool, concerning the enantiomeric distribution and detailed correlation of this with organoleptic characteristics and eventually biological activity.

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