Spectrophotometric determination of ethionamide in pharmaceuticals using Folin–Ciocalteu reagent and iron(III)-ferricyanide as chromogenic agents
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Selective Spectrophotometric Determination of Metformin Hydrochloride in Pharmaceuticals and Urine Using Two Nitrophenols as Chromogenic Agents
Metformin hydrochloride (MFH) is an oral anti-diabetic drug of biguanide class. Two selective spectrophotometric methods were presented for the determination of MFH in pharmaceuticals. The methods were based on the measurement of yellow-coloured charge-transfer complexes formed between MFH and two poly-nitrophenols, namely, 2,4-dinitrophenol (DNP method, at 405 nm) and picric acid (PA met...
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metformin hydrochloride (mfh) is an oral anti-diabetic drug of biguanide class. two selective spectrophotometric methods were presented for the determination of mfh in pharmaceuticals. the methods were based on the measurement of yellow-coloured charge-transfer complexes formed between mfh and two poly-nitrophenols, namely, 2,4-dinitrophenol (dnp method, at 405 nm) and picric acid (pa method; a...
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Simple, sensitive and accurate methods for determination of four drugs viz., Ciprofloxacin, Pantoprazole Sodium Sesquihydrate, Atrovastatin Calcium and Rosuvastine Calcium have been developed. The methods depend upon the oxidation of the drug by a known excess Ceric Ammonium Sulphate in sulphuric acid medium and subsequent determination of unreacted Ce (IV) using Amaranth dye. The methods have ...
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A simple and highly sensitive spectrophotometric method has been described for the determination of trace amount of osmium(VIII) using ethylene thiourea (ETU) as a chromogenic reagent. The method is based on the formation of an instantaneous purple coloured complex at room temperature by the reaction of osmium(VIII) with ETU in strongly acidic (pH=1) solution having absorption maximum at 490 nm...
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Um método espectrofotométrico simples, rápido e sensível foi desenvolvido para a determinação traço de cromo usando azul de Variamina como reagente cromogenico. O método proposto consiste na reação de cromo(VI) com iodeto de potássio, em meio ácido, liberando iodeto que então oxida o azul de Variamina formando um composto de cor violeta com o máximo de absorção em 556 nm. A lei de Beer é obedec...
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ژورنال
عنوان ژورنال: Journal of Taibah University for Science
سال: 2017
ISSN: 1658-3655
DOI: 10.1016/j.jtusci.2016.07.002