title: Simultaneous Quantitative Determination of 12 Active Components in Yuanhu Zhitong Prescription by RP-HPLC Coupled with Photodiode Array Detection.
abstract: BACKGROUND
  Yuanhu Zhitong prescription (YZP) is a famous traditional Chinese medicine formula, which is officially recorded in Chinese Pharmacopoeia for the treatment of stomach pain, hypochondriac pain, headache and dysmenorrhea caused by qi-stagnancy and blood stasis. It is the first report for the simultaneous determination of 12 active components in YZP.
  
  
  OBJECTIVE
  A newly, simple, accurate and reliable method for the separation and determination of 12 active components (protopine, α-allocryptopine, coptisine, xanthotol, palmatine, dehydrocorydaline, glaucine, tetrahydropalmatine, tetrahydroberberine, imperatorin, corydaline, isoimperatorin) in YZP was developed and validated using HPLC-PAD.
  
  
  METHODS
  The analytes were performed on a Phenomenex Luna-C18 (2) column (250×4.6 mm, 5.0 μm) with a gradient elution program using a mixture of acetonitrile and 0.1% phosphoric acid water solution (adjusted with triethylamine to pH 5.6) as mobile phase. Analytes were performed at 30°C with a flow rate of 1.0 mL/min.
  
  
  RESULTS
  The validated method was applied to analyze four major dosage forms of YZP coming from different manufacturers with good linearity (r(2), 0.9981~0.9999), precision (RSD, 0.24~2.89%), repeatability (RSD, 0.15~3.34%), stability (RSD, 0.14~3.35%), recovery (91.13~110.81%) of the 12 components.
  
  
  CONCLUSIONS
  The proposed method enables the separation and determination of 12 active components in a single run for the quality control of YZP.
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Xiaokai
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Pharmacy Department, Tangdu Hospital, Fourth Military Medical University, Xi'an, People's Republic of China.
authors.forename: Song
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Cao
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Qiu
authors.affiliation: Institute of Materia Medica, School of Pharmacy, Fourth Military Medical University, Xi'an, China ; The Cultivation Project of Collaborative Innovation Center for Chinese Medicine in QinBa Mountains, Xi'an, China.
authors.forename: Siwang
authors.initials: S
authors.lastname: Wang
keywords: Angelica dahurica; Corydalis yanhusuo; HPLC; Yuanhu Zhitong; quality control