title: Spectrophotometric and LC determination of two binary mixtures containing antihistamins.
abstract: Several methods are developed for the determination of two binary mixtures containing cyclizine hydrochloride with pyridoxine HCl (mixture (mix.) 1); and cinnarizine with piracetam (mix. 2). The resolution of the two binary mixtures has been accomplished by using numerical spectrophotometric methods as partial least squares (PLS-1) and principal component regression applied to UV spectra of the mixture and graphical spectrophotometric method as second derivative of the ratio spectra (2DD). In addition, HPLC methods were developed depending on using RP18 column with mobile phase consisting of acetonitrile/0.05 M KH2PO4 (50:50, v/v, pH 4.0) with UV detection at 239 nm for mix. 1, and mobile phase consisting of acetonitrile/0.05 M KH2PO4/triethylamine (50:50:0.2, v/v/v, pH 3.0) with UV detection at 227 nm for mix. 2. The proposed methods were successfully applied for the determination of the two binary combinations in synthetic mixtures and commercial tablets.
authors.affiliation: Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt. ghhadad@hotmail.com
authors.forename: Alaa
authors.initials: A
authors.lastname: El-Gindy
authors.forename: Samy
authors.initials: S
authors.lastname: Emara
authors.forename: Ahmed
authors.initials: A
authors.lastname: Mostafa
mesh_terms: D002626:Chemistry, Pharmaceutical; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D006634:Histamine H1 Antagonists / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013678:Technology, Pharmaceutical / Q000379:methods*
chemical_list: D006634:Histamine H1 Antagonists