Resumen de Analysis of volatile compounds and antioxidant activity of Colombian ginger (Zingiber officinale) essential oil obtained by hydrohydraulic distillation assisted by microwave radiation

José Libardo Tapiero Cuéllar, Guillermo Salamanca, Maria Andrea Benitez

• The (Zingiber officinale) is a plant of the zingiberáceas family, its rhizome is widely used in gastronomy for its pungent aroma and flavor. Essential oils (EO) are natural compounds; they have 25 to 70 components with different concentrations. Α-Zingiberene and α-Felandrene are the main components with volumes between 20% and 70%. For the extraction of the AE samples from 10 Colombian geographical locations were used, obtained by microwave radiated hydrodistillation (MWHD) and stored at 4°C in amber vials. 50 µL of EA and 1.0 µL of (n-tetradecane) internal standard were dissolved in dichloromethane to a final volume of 1.0 mL. The EO components were performed on a triple quadruple mass detector gas chromatograph (BRUKER 450GC-320). For its antioxidant activity (AA) the methodology of Prior for DPPH* and ABTS+ was used. The extractions showed a yield between 0.053 and 0.109 percent; and 300 g of sample at 700 watts and 40 minutes of process were used. The chromatographic profile showed 43 components referring to ketones, alcohols, cyclic ethers, aldehydes and 23 hydrocarbons, with α-Zingiberene being the majority, considered as a molecular marker of this EO. The AA presents significant differences between the samples evaluated for the localities studied.