1. Comparison of classical and ultrasound-assisted extractions of steroids and triterpenoids from three Chresta spp.
- Author
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Schinor EC, Salvador MJ, Turatti IC, Zucchi OL, and Dias DA
- Subjects
- Chromatography, Gas, Cluster Analysis, Flowers chemistry, Plant Extracts chemistry, Plant Leaves chemistry, Plant Stems chemistry, Reference Standards, Steroids isolation & purification, Triterpenes isolation & purification, Ultrasonics, Plants, Medicinal chemistry, Steroids chemistry, Triterpenes chemistry
- Abstract
A comparative study of classical and ultrasound-assisted extractions of steroids and triterpenoids from stem, leaves and flowers of Chresta exsucca, C. scapigera and C. sphaerocephala is described. The direct analysis of crude apolar and medium-polar extracts has been conducted by high-resolution gas chromatography followed by co-injections of the crude extract with certified standards on capillary columns of different polarities. The use of ultrasound decreased significantly the total time of treatment and in addition, this extraction method was more effective for the steroids and most of the triterpenes.
- Published
- 2004
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