title: Determination of five components in Ixeris sonchifolia by high performance liquid chromatography.
abstract: A high performance liquid chromatography (HPLC) method was developed for the simultaneous quantification of five major active ingredients (markers) in Ixeris sonchifolia (Bge.) Hance, namely chlorogenic acid, caffeic acid, luteolin-7-O-beta-D-glucuronide, luteolin-7-O-beta-D-glucoside and luteolin. Samples were extracted with 70% methanol. The chromatographic separation was performed on a Hypersil ODS(2) column (250 mm x 4.6 mm i.d.; 5 microm) with a gradient of acetonitrile and 0.5% (v/v) aqueous acetic acid, at a flow rate of 1.0 ml/min, detected at 335 nm. Five regression equations showed good linear relationships (r(2)>0.999) between the peak area of each marker and concentration. The assay was reproducible with overall intra- and inter-day variation of less than 3.2%. The recoveries, measured at three concentration levels, varied from 94.1% to 100.7%. This assay was successfully applied to the determination of the 5 bioactive compounds in 18 samples. The results indicated that the developed assay method was rapid, accurate, reliable and could be readily utilized as a quality control method for I. sonchifolia (Bge.) Hance.
authors.affiliation: School of Pharmacy, Shenyang Pharmaceutical Universit, Wenhua Road 103, Shenyang 110016, Liaoning Province, PR China.
authors.forename: Ran
authors.initials: R
authors.lastname: Yin
authors.forename: Xin-Xiu
authors.initials: XX
authors.lastname: Deng
authors.forename: Fei
authors.initials: F
authors.lastname: Han
authors.forename: Zhen
authors.initials: Z
authors.lastname: Song
authors.forename: Wei-Ming
authors.initials: WM
authors.lastname: Cheng
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Chen
authors.forename: Kai-Shun
authors.initials: KS
authors.lastname: Bi
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002109:Caffeic Acids / Q000032:analysis* / Q000737:chemistry; D002726:Chlorogenic Acid / Q000032:analysis* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005960:Glucosides / Q000032:analysis* / Q000737:chemistry; D020719:Glucuronides / Q000032:analysis* / Q000737:chemistry; D047311:Luteolin / Q000032:analysis* / Q000737:chemistry; D015394:Molecular Structure; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D002109:Caffeic Acids; D005960:Glucosides; D020719:Glucuronides; D002726:Chlorogenic Acid; D047311:Luteolin; C040048:caffeic acid