title: Comparison of extraction methods for marker compounds in the essential oil of lemon grass by GC.
abstract: A gas chromatography flame ionization detection method for the quantification of bioactive marker compounds (neral, geranial, geraniol, limonene, citronellal, and beta-myrcene) in the essential oil of Cymbopogon citratus (lemon grass) was developed. Four procedures for the extraction of essential oils from C. citratus were compared including solvent extraction, steam distillation extraction, accelerated solvent extraction, and supercritical fluid extraction. Solvent extraction by sonication with nonpolar solvents showed comparable results to the steam distillation method. Several commercial products prepared from C. citratus and Cymbopogon flexuosus were analyzed and compared.
authors.affiliation: National Center for Natural Products Research, Research Institute of Pharmaceutical Sciences, The University of Mississippi, University, Mississippi 38677, USA.
authors.forename: Brian T
authors.initials: BT
authors.lastname: Schaneberg
authors.forename: Ikhlas A
authors.initials: IA
authors.lastname: Khan
mesh_terms: D000080462:Acyclic Monoterpenes; D000447:Aldehydes / Q000032:analysis; D002849:Chromatography, Gas / Q000379:methods; D025924:Chromatography, Supercritical Fluid; D053138:Cyclohexenes; D000077222:Limonene; D039821:Monoterpenes; D010936:Plant Extracts / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D006109:Poaceae / Q000737:chemistry*; D013010:Sonication; D013227:Steam; D013729:Terpenes / Q000032:analysis
chemical_list: D000080462:Acyclic Monoterpenes; D000447:Aldehydes; D053138:Cyclohexenes; D039821:Monoterpenes; D010936:Plant Extracts; D010938:Plant Oils; D013227:Steam; D013729:Terpenes; C008574:beta-myrcene; D000077222:Limonene; C007836:geraniol; C108217:citronellal; C007076:citral