title: Determination of liquiritin, naringin, hesperidin, thymol, imperatorin, honokiol, isoimperatorin, and magnolol in the traditional Chinese medicinal preparation Huoxiang-zhengqi liquid using high-performance liquid chromatography.
abstract: High-performance liquid chromatography was employed to determine the contents of the eight marker components liquiritin, naringin, hesperidin, thymol, imperatorin, honokiol, isoimperatorin, and magnolol in the traditional Chinese medicinal preparation Huoxiang-zhengqi liquid. The separation was performed on a C(18) column by stepwise gradient elution with water-methanol-acetonitrile (0.01 min, 68:30:2; 20 min, 60:38:2; 50 min, 34:64:2; 65 min, 34:64:2; 75 min, 28:70:2; 85 min, 68:30:2) as the mobile phase at a flow rate of 1 ml/min, with UV detection at 283 nm. Eight regression equations showed good linear relationships between the peak area ratio of each marker to internal standard and amounts. The recoveries of the markers listed above were 97.4, 98.5, 97.4, 98.6, 97.8, 99.2, 97.0, and 97.5%, respectively. The repeatability and reproducibility (relative standard deviation) of the method were less than 2.2 and 3.0%, respectively.
authors.affiliation: Medical Center of Shenzhen Peking University, The Hong Kong University of Science and Technology, Peking University Shenzhen Hospital, Shenzhen 518036, P.R. China.
authors.forename: Kang
authors.initials: K
authors.lastname: Li
authors.forename: Jinsong
authors.initials: J
authors.lastname: Yuan
authors.forename: Weiwei
authors.initials: W
authors.lastname: Su
mesh_terms: D001713:Biphenyl Compounds / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D044950:Flavanones / Q000032:analysis / Q000302:isolation & purification*; D011564:Furocoumarins / Q000032:analysis / Q000302:isolation & purification*; D005960:Glucosides / Q000032:analysis / Q000302:isolation & purification*; D006569:Hesperidin / Q000032:analysis / Q000302:isolation & purification*; D017705:Lignans / Q000032:analysis / Q000302:isolation & purification*; D015203:Reproducibility of Results; D012996:Solutions; D013943:Thymol / Q000032:analysis / Q000302:isolation & purification*; D000498:Allyl Compounds; D010636:Phenols
chemical_list: D001713:Biphenyl Compounds; D004365:Drugs, Chinese Herbal; D044950:Flavanones; D011564:Furocoumarins; D005960:Glucosides; D006569:Hesperidin; D017705:Lignans; D012996:Solutions; D013943:Thymol; C516480:Huoxiang-zhengqi; C005498:magnolol; C055542:isoimperatorin; C005499:honokiol; D000498:Allyl Compounds; D010636:Phenols; C031534:imperatorin; C005274:naringin; C512196:liquiritin