peoniflorin and daidzein

A liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method was developed and validated for simultaneous determination of seven constituents including puerarin, daidzin, daidzein, paeoniflorin, albiflorin, liquiritin and liquiritigenin in rat plasma using schisandrin as the internal standard (IS). The plasma samples were pretreated by a one-step direct protein precipitation with acetonitrile. The chromatographic separation was carried out on a C18 column with a gradient mobile phase consisting of acetonitrile and water (containing 0.1% formic acid and 5mM ammonium acetate). All analytes and IS were quantitated through electrospray ionization in positive ion multiple reaction monitoring (MRM) mode. The mass transitions were as follows: m/z 417.5→297.2 for puerarin, m/z 417.1→255.2 for daidzin, m/z 255.2→152.4 for daidzein, m/z 498.1→179.3 for paeoniflorin, m/z 481.1→197.3 for albiflorin, m/z 436.2→257.3 for liquiritin, m/z 257.2→137.3 for liquiritigenin and m/z 415.0→384.2 for IS, respectively. All calibration curves exhibited good linearity (r>0.9979) over a wide concentration range for all components. The intra-day and inter-day precisions (RSD) at three different levels were both less than 14.3% and the accuracies (RE) ranged from -13.2% to 14.8%. The extraction recoveries of the seven compounds ranged from 72.9% to 117.4%. The validated method was successfully applied to pharmacokinetic study of the seven components in female rat plasma after oral administration of Ge-Gen Decoction aqueous extract.

Topics: Animals; Bridged-Ring Compounds; Chromatography, High Pressure Liquid; Drugs, Chinese Herbal; Flavanones; Glucosides; Isoflavones; Monoterpenes; Rats; Spectrometry, Mass, Electrospray Ionization; Tandem Mass Spectrometry

An HPLC-photodiode array (PDA) detection method was established for the simultaneous determination of 12 components in Xiao-Yao-San-Jia-Wei (XYSJW): geniposide, puerarin, paeoniflorin, ferulic acid, liquiritin, hesperidin, naringin, paeonol, daidzein, glycyrrhizic acid, honokiol, and magnolol. These were separated in less than 70 min using a Waters Symmetry Shield RP 18 column with gradient elution using (A) acetonitrile, (B) water, and (C) acetic acid at a flow rate of 1 ml/min, and with a PDA detector. All calibration curves showed good linear regression (r(2)>0.9992) within the test ranges. The method was validated for specificity, accuracy, precision, and limits of detection. The proposed method enables in a single run the simultaneous identification and determination for quality control of 12 multi-structural components of XYSJW forming the basis of its therapeutic effect.

Topics: Acetophenones; Benzoates; Biphenyl Compounds; Bridged-Ring Compounds; Coumaric Acids; Drugs, Chinese Herbal; Flavanones; Glucosides; Glycyrrhizic Acid; Hesperidin; Iridoids; Isoflavones; Lignans; Medicine, Chinese Traditional; Molecular Structure; Monoterpenes; Quality Control; Reference Standards; Reproducibility of Results; Sensitivity and Specificity