Spectrophotometric determination of repaglinide in tablets based on charge-transfer complexation reaction with chloranilic acid and dichloro-dicyano benzoquinone
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منابع مشابه
Spectrophotometric Determination of Astemizole and Loratadine Based on Charge-Transfer Complex Formation with Chloranilic Acid
A simple and sensitive spectrophotometric method for the assay of two antihistamines, astemizole and loratadine, is described. The determination was based on the formation of chargetransfer complexes between chloranilic acid as a p acceptor and the studied drugs as n-donors in acetonitrile solvent. The spectra, various experimental parameters, composition and formation constant of the complexes...
متن کاملPotentiometric and Spectrophotometric Determination of Phenothiazine Derivatives Based on Their Titration with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone
The reaction between phenothiazine and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) in the presence of p-toluenesulfonic acid in chloroform was investigated by potentiometry, voltammetry and spectrophotometry, and the reaction pathways were proposed. The conditions for the oxidimetric titration of phenothiazines with a standard chloroform solution of DDQ were optimized and the potentiometric...
متن کاملValidated spectrophotometric methods for the determination of amiodarone hydrochloride in commercial dosage forms using p-chloranilic acid and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone.
Two simple, sensitive and economical spectrophotometric methods have been developed for the determination of amiodarone hydrochloride in pure form and commercial dosage form. These methods (A and B) are based on the reaction of amiodarone base as n-electron donor with p-chloranilic acid and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) as pi-acceptors to give highly colored complex species wh...
متن کاملSpectrophotometric Determination of Drugs Using 2,3-Dichloro 5,6-dicyano p- benzoquinone as Analytical Reagent
Six drugs viz., Astemizole, Domperidone, Esomeprazole, Losartan potassium, Sumatriptan and Terazosin were tested for the formation of charge transfer complexes with 2, 3-dichloro 5, 6-dicyanopbenzoquinone, (DDQ). Each of these drugs turned the pale yellow colour of reagent i.e DDQ. in CH3CN, to purple and exhibited three bands at 455, 545 and 588 nm due to anion of the reagent whose intensity i...
متن کاملSpectrophotometric determination of atropine, pilocarpine and strychnine with chloranilic acid.
In dioxan-chloroform medium the acceptor chloranilic acid forms 1:1 molecular complexes with the alkaloids atropine, pilocarpine and strychnine, with maximum absorption at 535, 527.5 and 535 nm respectively. Conformity with Beer's law allows the use of the complexes for the assay of these drugs.
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ژورنال
عنوان ژورنال: Chemical Industry and Chemical Engineering Quarterly
سال: 2011
ISSN: 1451-9372,2217-7434
DOI: 10.2298/ciceq110528033c