Chemical characterization of rosewood (Aniba rosaeodora Ducke) leaf essential oil by comprehensive two-dimensional gas chromatography coupled with quadrupole mass spectrometry

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The Amazonian tree Aniba rosaeodora Ducke, whose wood provides commercial essential oil for perfumery houses, is at risk of extinction and listed by CITES. An alternative source of this oil would be to trim leaves of young plants and steam distill them to obtain the essential oil. Four-year-old plant material could provide an oil that can both be an economical source and eventually a replacement for wood oil in perfumery. A characterization of the essential oil from these leaves has been obtained by comprehensive two-dimensional gas chromatography. The two-dimensional analytical technique was able to separate and identify about three times more compounds than is the case with conventional gas chromatography, leading to a more complete essential oil chemical characterization.243245251Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Instituto Nacional de Ciencia e Tecnologia (INCT) de BioanaliticaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

Development and Evaluation of Emulsions from Carapa guianensis (Andiroba) Oil

Carapa guianensis, a popular medicinal plant known as “Andiroba” in Brazil, has been used in traditional medicine as an insect repellent and anti-inflammatory product. Additionally, this seed oil has been reported in the literature as a repellent against Aedes aegypti. The aim of this work is to report on the emulsification of vegetable oils such as “Andiroba” oil by using a blend of nonionic surfactants (Span 80® and Tween 20®), using the critical hydrophilic–lipophilic balance (HLB) and pseudo-ternary diagram as tools to evaluate the system’s stability. The emulsions were prepared by the inverse phase method. Several formulations were made according to a HLB spreadsheet design (from 4.3 to 16.7), and the products were stored at 25°C and 4°C. The emulsion stabilities were tested both long- and short-term, and the more stable one was used for the pseudo-ternary diagram study. The emulsions were successfully obtained by a couple of surfactants, and the HLB analysis showed that the required HLB of the oil was 16.7. To conclude, the pseudo-ternary diagram identified several characteristic regions such as emulsion, micro-emulsion, and separation of phases