title: Comparative study on the selectivity of various spectrophotometric techniques for the determination of binary mixture of fenbendazole and rafoxanide.
abstract: Five different spectrophotometric methods were applied for simultaneous determination of fenbendazole and rafoxanide in their binary mixture; namely first derivative, derivative ratio, ratio difference, dual wavelength and H-point standard addition spectrophotometric methods. Different factors affecting each of the applied spectrophotometric methods were studied and the selectivity of the applied methods was compared. The applied methods were validated as per the ICH guidelines and good accuracy; specificity and precision were proven within the concentration range of 5-50 μg/mL for both drugs. Statistical analysis using one-way ANOVA proved no significant differences among the proposed methods for the determination of the two drugs. The proposed methods successfully determined both drugs in laboratory prepared and commercially available binary mixtures, and were found applicable for the routine analysis in quality control laboratories.
authors.affiliation: Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt.
authors.forename: Ahmed S
authors.initials: AS
authors.lastname: Saad
authors.affiliation: National Organization for Drug Control and Research (NODCAR), 6 Abu Hazem Street, Pyramids Ave, P.O. Box 29, Giza, Egypt.
authors.forename: Ali K
authors.initials: AK
authors.lastname: Attia
authors.affiliation: National Organization for Drug Control and Research (NODCAR), 6 Abu Hazem Street, Pyramids Ave, P.O. Box 29, Giza, Egypt.
authors.forename: Manal S
authors.initials: MS
authors.lastname: Alaraki
authors.affiliation: Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt.
authors.forename: Eman S
authors.initials: ES
authors.lastname: Elzanfaly
mesh_terms: D002626:Chemistry, Pharmaceutical / Q000379:methods* / Q000592:standards; D004304:Dosage Forms; D004338:Drug Combinations; D005273:Fenbendazole / Q000032:analysis* / Q000737:chemistry; D057230:Limit of Detection; D011888:Rafoxanide / Q000032:analysis* / Q000737:chemistry; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000379:methods
chemical_list: D004304:Dosage Forms; D004338:Drug Combinations; D011888:Rafoxanide; D005273:Fenbendazole
keywords: Dual wavelength; Fenbendazole; First derivative; H-point standard addition method; Rafoxanide; Ratio derivative and difference