A sensitive, simple, rapid and reliable spectrofluorimetric assay was developed for the assay of definite antimigraine drugs namely; Almotriptan malate, Rizatriptan benzoate, Sumatriptan succinate and Zolmitriptan in their pharmaceutical preparations and biological fluid. The suggested procedure was established on determination of the quenching process resulting from the action of the studied drugs on the native fluorescence of Eosin Y via developing of a binary complex reaction between the cited antimigraine preparations and Eosin Y in 0.2 M acetate buffer (pH.3.5). Under the optimized experimental conditions, the relative fluorescence capacity was determined at λ ex =301.3 nm and λ em =542.8 nm. The calibration graphs were linear through extent from 0.07-1.0, 0.20-1.0, 0.2-1.0 and 0.1-1.0 µg/mL, for Almotriptan malate, Rizatriptan benzoate, Sumatriptan succinate and Zolmitriptan, respectively. The detection limits were 0.019, 0.041, 0.055 and 0.032 µg/mL while quantitation limits were 0.059, 0.125, 0.168 and 0.096 µg/mL for Almotriptan malate, Rizatriptan benzoate, Sumatriptan succinate and Zolmitriptan, respectively. The suggested assay has been validated according to ICH and USP guidelines and favorably has been applied to assay of cited drugs in their dosage forms and content uniformity testing. The high sensitivity of the developed assay allowed quantification of the studied antimigraine drugs in human plasma.

A comparative study for the validation and advancement of two analytical approaches applied for the simultaneous determination of Mometasone Furoate (MF), Miconazole Nitrate (MIC) and Gentamicin (GM) formulated in Momenta® cream. The first approach was TLC-spectrodensitometric method, which was advanced by separating the three components on TLC aluminum plates coated with silica gel 60 F254 using chloroform: methanol: formic acid (4:0.3:0.15, v/v/v) as a mobile phase, then scanned at 254nm using Camage TLC scanner 3 operated in reflectance-absorbance mode. The second approach was the chemometric method using two models: Partial Least Squares (PLS) and Principle Component Regression Model (PCR). The proposed approaches were validated according to ICH guidelines and were applied for the determination of the ternary mixtures in their analytical mixtures and pharmaceutical preparation.