Eugenol supplementation as an additive to improve the thermal stability of Hedychium coronarium Koening essential oil

CASTRO, RICARDO I; GUZMAN, LUIS; FORERO-DORIA, OSCAR; JIMÉNEZ MACIAS, JULYLETH P; MARIN, JAIME GALLEGO; VERGARA, CLAUDIA E.; ESGUERRA, SARAY K GUALTEROS; GUTIERREZ, MARGARITA

The Natural Products Journal

benthamscience

Año: 2019 vol. 09

2210-3155

The 4-allyl-2-metoxy-phenol (Eugenol) is a phenolic compound with a wide spectrum of biological activities such as antibacterial and antioxidant, among others. In particular, eugenol has proven to prevent the lipid peroxidation induced by reactive oxygen species, also in conjunction with its high solubility in organic solvents and its weak acidity, make this compound an ideal candidate as a natural antioxidant additive, especially for those substances that are affected by lipoperoxidation process, this is the case of essential oilsthat have an important role in the food, perfumery and pharmaceutical industries, which easily deteriorate under high temperature, strong light, and reactive oxygen species. Given the above, the aim of this study wasto determine the improvement of the thermo-oxidative process of the essential oil extracted from leaves of Hedychium coronarium in which have been reported significant bioactive properties. To evidence the influence of the addition of eugenol in the thermal properties of the H. coronarium essential oil, weredetermined the chemical composition and TG/DTG analysis after the supplementation with different ratios of eugenol/essential oil, the results showed a high content of oxygenated monoteropenes (50.33%), followed bymonoterpene hydrocarbons (23.35%) and sesquiterpene (19.2%), the TG/DTG analysis presented a significant increment in the degradation temperature of the essential oil, being the major value 10.82 ºC at a supplementation of 4.7% (v/v) of eugenol. Finally, the supplementation with eugenol improved the stability ofthe essential oil of H. coronarium, which could be applicable to other oils thereby improving their physicochemical properties.