Comparison of classical and ultrasound-assisted extractions of steroids and triterpenoids from three Chresta spp.
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.
Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900, 14040-901, Brazil. elisandraemario@bol.com.br
Elisandra C
EC
Schinor
Marcos J
MJ
Salvador
Izabel C C
IC
Turatti
Orghêda L A D
OL
Zucchi
Diones A
DA
Dias
D002849:Chromatography, Gas; D016000:Cluster Analysis; D035264:Flowers / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012015:Reference Standards; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification; D014465:Ultrasonics
D010936:Plant Extracts; D013256:Steroids; D014315:Triterpenes