CARACTERIZAÇÃO FITOQUÍMICA DE EXTRATOS DE Zingiber officinale R.

Abstract

The aim of this study was to identify some classes of compounds of the secondary metabolism of Zingiber officinale R., through qualitative tests of the crude extracts of ginger. In the preparation of ethanolic and aqueous ginger extracts, the rhizomes of the plant were cut into small cubes and immersed in heated distilled water (37 ° C) or ethanol for three days, in the dark, for extraction. The extracts were then filtered and rotated to concentrate the compounds of interest. The crude extracts were evaluated for phytochemical characteristics. At the end of the extraction process, approximately 2.84% and 3.23% yield of the crude ethanolic and aqueous extracts were obtained, respectively. In the characterization, the presence of saponins, polyphenols / tannins, terpenes, steroids, flavonoids, cardiotonic glycosides and alkaloids was observed in the ethanolic group, and, in contrast, only terpenes and steroids in the aqueous sample. Based on the above, the compounds observed in the crude extracts of ginger, for the most part, can be used as a vegetable alternative to synthetic substances in different segments of the food industry.