title: [Simultaneous determination of scopolamine hydrobromide, atropine sulfate, ephedrine hydrochloride and pseudoephedrine hydrochloride in Zhichuanling oral liquid with HPLC].
abstract: OBJECTIVE
  To establish an HPLC method for determining the contents of scopolamine hydrobromide, atropine sulfate, ephedrine hydrochloride and pseudoephedrine hydrochloride in Zhichuanling oral liquid.
  
  
  METHODS
  Agela Durashell RP-C18 (4. 6 mm x250 mm, 5 microm) was adopted, with acetonitrile-sodium phosphate buffer solution (0. 07 mol L-1 sodium phosphate solution with 17.5 mmol L-1 sodium dodecylsulfate adjusted to pH 6.0 with phosphoric acid solution) (30:70) as the mobile phase. The flow rate was 0. 9 mL min -1, the detection wavelength was 207 nm, and the column temperature was 25 degree C.
  
  
  RESULTS
  Scopolamine hydrobromide, atropine sulfate, ephedrine hlvdrochloride and pseudoephedrine hydrochloride showed good linear relations with peak areas within the concentration range of 0. 021 21-1. 060 5 pg (r =0. 999 3) , 0. 011 14-0. 557 microg (r = 0. 999 6) , 0. 200 56-10. 028 microg (r =0. 999 7) and 0.070 33-3. 516 5 gg (r =0. 999 6), respectively, with the average recoveries of 101.9% , 99. 80%, 100. 3%, 100. 2% (n=6).
  
  
  CONCLUSIONS
  The method was so quick, simple, highly reproducible and specific that it could be used as one of quality control methods of Zhichuanling oral liquid.
authors.affiliation: Jiangsu Institute for Drug and Food Control, Nanjing 210008, China. mouserya@21cn.com
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Zhang
authors.affiliation: Jiangsu SZYY Group Pharmaceutical Limited, Jiangyan 225500, China.
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Li
mesh_terms: D001285:Atropine / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004809:Ephedrine / Q000032:analysis*; D054199:Pseudoephedrine / Q000032:analysis*; D012601:Scopolamine / Q000032:analysis*
chemical_list: D001285:Atropine; D054199:Pseudoephedrine; D012601:Scopolamine; D004809:Ephedrine