title: Quantitative determination of ketoprofen in gels and ampules by using flow-injection UV spectrophotometry and HPLC.
abstract: A flow-injection UV spectrophotometric method for the determination of ketoprofen in gels and ampules was developed. Quantitative determination of ketoprofen was realized by using distilled water as a carrier for gels and citrate buffer, pH 6.5, for ampules at 261 nm. No spectrophotometric interferences from additives of gels, carboxypolymethylene and triethanolamine, were observed. There were also no spectrophotometric interferences resulting from additives of ampules named as benzyl alcohol and arginine. The detection limits were 0.436 and 0.303 microg/ml for gels and ampules, respectively. Throughout the study, the flow rate, loop volume and the number of injection per hour were 13.8 mlmin(-1), 193 mcirol and 85, respectively. Analytical signal of the ketoprofen was linear in the concentration range of 7.5-75 microg/ml. Quantitative results of ketoprofen in gels, 25.25+/-0.27 (mean+/-S.D.), and in ampules, 99.42+/-0.44 were in good agreement with the labeled quantities (25 mg/1g gel, 100 mg/2 ml ampule). The recoveries were in the range of 98.65-100.63 and 99.1-101.5% for gels and ampules, respectively. Results obtained were in accordance with those obtained by HPLC. It was seen that the proposed method was fast, accurate, precise and suitable for automation as an analytical method.
authors.affiliation: Department of Analytical Chemistry, Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey.
authors.forename: Cihad
authors.initials: C
authors.lastname: Ozlü
authors.forename: Hasan
authors.initials: H
authors.lastname: Basan
authors.forename: Eda
authors.initials: E
authors.lastname: Satana
authors.forename: Nusret
authors.initials: N
authors.lastname: Ertaş
authors.forename: Nilgün G
authors.initials: NG
authors.lastname: Göğer
mesh_terms: D000180:Acrylic Resins; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000032:analysis / Q000737:chemistry; D001120:Arginine / Q000032:analysis; D001592:Benzyl Alcohols / Q000032:analysis; D002021:Buffers; D002138:Calibration; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002855:Chromatography, Thin Layer; D004305:Dose-Response Relationship, Drug; D004355:Drug Stability; D004983:Ethanolamines / Q000032:analysis; D005782:Gels; D006863:Hydrogen-Ion Concentration; D007660:Ketoprofen / Q000032:analysis* / Q000737:chemistry; D008956:Models, Chemical; D011145:Polyvinyls / Q000032:analysis; D015203:Reproducibility of Results; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D013607:Tablets; D013678:Technology, Pharmaceutical / Q000379:methods; D014466:Ultraviolet Rays
chemical_list: D000180:Acrylic Resins; D000894:Anti-Inflammatory Agents, Non-Steroidal; D001592:Benzyl Alcohols; D002021:Buffers; D004983:Ethanolamines; D005782:Gels; D011145:Polyvinyls; D013607:Tablets; C006912:carboxypolymethylene; D007660:Ketoprofen; D001120:Arginine; C009546:triethanolamine