title: Phytochemical screening and quantification of flavonoids from leaf extract of Jatropha curcas Linn.
abstract: BACKGROUND
  The Jatropha curcas L. (Euphorbiaceae) herb is found in SouthWest, Nigeria and other parts of West Africa, and is claimed to possess anti-hypertensive property.
  
  
  OBJECTIVE
  The phytochemical screening and flavonoid quantification of the leaf extract of Jatropha curcas Linn were studied.
  
  
  METHODS
  The phytochemical screening of the methanolic leaf extract of J. curcas L. was carried using acceptable and standard methods. The flavonoid contents of the leaf extract of Jatropha curcas L. were determined using thin layer chromatography (TLC), infrared spectroscopy (IRS) and a reversed phase high performance liquid chromatography (HPLC).
  
  
  RESULTS
  The phytochemical screening of the methanolic extract of the leaves of the plant shows the presence of alkaloids, cardiac glycosides, cyanogenic glycosides, phlobatannins, tannins, flavonoids and saponins. To quantify the flavonoid contents of leaf extract of Jatropha curcas L, extracts from the plant samples where examined in a C-18 column with UV detection and isocratic elution with acetonitrile; water (45:55). Levels of flavonoids (flavones) in leaves ranged from 6:90 to 8:85 mg/g dry weight.
  
  
  CONCLUSIONS
  Results indicate that the methanolic extract of the leaves of Jatropha curcas L. contains useful active ingredients which may serve as potential drug for the treatment of diseases. In addition, a combination of TLC, IRS and HPLC can be used to analyse and quantify the flavonoids present in the leaves of Jatropha curcas L.
authors.affiliation: Department of Biochemistry, College of Medicine, University of Lagos, P. M. B 12003, Lagos, Nigeria, W/Africa. ebuehi@yahoo.com
authors.forename: O A T
authors.initials: OA
authors.lastname: Ebuehi
authors.forename: N A
authors.initials: NA
authors.lastname: Okorie
mesh_terms: D002851:Chromatography, High Pressure Liquid; D056148:Chromatography, Reverse-Phase; D002855:Chromatography, Thin Layer; D005419:Flavonoids / Q000302:isolation & purification*; D031286:Jatropha / Q000737:chemistry*; D000432:Methanol; D010936:Plant Extracts / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry
chemical_list: D005419:Flavonoids; D010936:Plant Extracts; D000432:Methanol