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• W2013449312 abstract "Rapid, sensitive and validated spectrophotometric methods for the determination of two antiepileptics (gabapentin (GAB) and pregabalin (PRG)) in pure forms and in pharmaceutical formulations was developed. The method is based on the formation of charge transfer complex between drug and the chromogenic reagents quinalizarin (Quinz) and alizarin red S (ARS) producing charge transfer complexes in methanolic medium which showed an absorption maximum at 571 and 528 nm for GAB and 572 and 538 nm for PRG using Quinz and ARS, respectively. The optimization of the reaction conditions such as the type of solvent, reagent concentration and reaction time were investigated. Beer’s law is obeyed in the concentration ranges 0.4–8.0 and 0.5–10 μg mL−1 for GAB and PRG using Quinz and ARS, respectively. The molar absorptivity, Sandell sensitivity, detection and quantification limits are also calculated. The correlation coefficients were ⩾0.9992 with a relative standard deviation (RSD%) of ⩽1.76. The methods are successfully applied to the determination of GAB and PRG in pharmaceutical formulations and the validity assesses by applying the standard addition technique, which compared with those obtained using the reported methods." @default.
• W2013449312 created "2016-06-24" @default.
• W2013449312 creator A5076390365 @default.
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• W2013449312 date "2013-03-01" @default.
• W2013449312 modified "2023-09-24" @default.
• W2013449312 title "Development and validation of sensitive spectrophotometric method for determination of two antiepileptics in pharmaceutical formulations" @default.
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• W2013449312 doi "https://doi.org/10.1016/j.saa.2012.12.053" @default.
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