منابع مشابه
Voltammetric and spectroscopic studies on binding of antitumor Morin, Morin-Cu complex and Morin-beta-cyclodextrin with DNA.
A systematic comparative study of the binding of antitumor Morin and its complexes with DNA has been investigated in the Britton-Robison (BR) buffer solutions using voltammetric and spectroscopic methods. The results show that Morin molecule, acting as an intercalator, is inserted into the cavity of the beta-cyclodextrin (beta-CD) as well as into the base stacking domain of the DNA double helix...
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The present work reports a kinetic spectrophotometric method for the determination of traceamounts of sulphite that is based on inhibitory effect of sulphite on the oxidation of Methyleneblue (MB) in acidic media. The reaction is followed spectrophotometrically by monitoring thedecrease in absorbance of MB at 664 nm with a fixed time of 0.5-4.5 minutes. It was found thatsulphite exert a strong ...
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A simple and rapid method has been developed for the determination of ascorbic acid in fruit and pharmaceutical products. The method is based on the measurement of the reaction rate between ammonium molybdate and ascorbic acid in acidic media. The reaction was monitored spectrophotometrically at 800 nm by fixed-time and variable-time methods. The calibration graph was linear in the range of...
متن کاملQuantitative determination of phenoxymethylpenicillin using kinetic method
The kinetic of conjugated reactions of S-oxidation and perhydrolysis of phenoxymethylpenicillin with potassium hydrogenperoxomonosulfate in alkaline medium has been studied by the light absorbance increase of a forming product at 269 nm. The procedure of the quantitative analysis of phenoxymethylpenicillin in powder and drug by the kinetic spectrophotometric method is elaborated using triple po...
متن کاملKinetic Determination of Ribavirin in Drug Formulations
Two simple and sensitive kinetic methods were developed for the determination of ribavirin in bulk and in its pharmaceutical preparations using alkaline potassium permanganate as an oxidizing agent. The methods are based upon a kinetic investigation of the oxidation reaction of the drug at room temperature for fixed times of 20 and 30 minutes. In the first method, the absorbance of the colored ...
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ژورنال
عنوان ژورنال: Journal of the Serbian Chemical Society
سال: 2004
ISSN: 0352-5139,1820-7421
DOI: 10.2298/jsc0406477k