title: [Determination of caffeine and sodium benzoate contents in caffeine and sodium benzoate injection by P-matrix method].
abstract: The contents of caffeine and sodium benzoate injection may be determined by P-matrix method without separation of its components. BSAIC language is used for programming. The average recovery of caffeine is 100.0% and that of sodium benzoate is 99.95%. The variation coefficient of caffeine is 0.40% and that of sodium benzoate is 0.65%. On the basis of recovery rate and data observed it is concluded that this method is accurate, reliable, simple and rapid as compared with the standard pharmacopoeia regulations.
authors.affiliation: Department of Analytical Chemistry, Hebei Medical University, 050017 Shijiazhunag.
authors.forename: X
authors.initials: X
authors.lastname: Huang
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: H
authors.initials: H
authors.lastname: Hou
authors.forename: Z
authors.initials: Z
authors.lastname: Zhang
authors.forename: W
authors.initials: W
authors.lastname: Liu
mesh_terms: D002110:Caffeine / Q000008:administration & dosage* / Q000032:analysis*; D007267:Injections; D011381:Programming Languages; D015203:Reproducibility of Results; D020160:Sodium Benzoate / Q000008:administration & dosage* / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000706:statistics & numerical data
chemical_list: D002110:Caffeine; D020160:Sodium Benzoate