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Reduction of Methylene Green by EDTA: A relation between dielectric constant of medium and activated state

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dc.contributor.author Noshab Qamar
dc.contributor.author Rafia Azmat
dc.contributor.author Raheela Naz
dc.date.accessioned 2023-01-19T05:32:38Z
dc.date.available 2023-01-19T05:32:38Z
dc.date.issued 2017-07-20
dc.identifier.citation Qamar, N., Azmat, R., & Naz, R. (2013). Reduction of Methylene Green by EDTA: A relation between dielectric constant of medium and activated state. Pak. J. Pharm. Sci, 26(1), 59-66. en_US
dc.identifier.issn 1011-601X
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/16087
dc.description.abstract Kinetics of an alkaline reduction of the methylene green with ethylenediaminetetraaceticacid (EDTA) as a role of dielectric constant of the medium with anecdotal ionic strength in a diverse solvent system (aqueous mixtures of methanol) (10-30%) was studied by measuring the specific rate constant of the reaction spectrophotometrically at λmax = 660nm. An effort has been made to give an elucidation of vital role of dielectric constant of the medium captivating into reflection of single sphere and double sphere complex in reaction assortment. This investigation leads to disclose that single sphere complex of the dye and reductant was found to be the most suitable complex existed in a varied organic solvent. The deviation of the theoretical values from experimental results for single sphere and double sphere complex model in the presence of an alkali and nitrate ions were justified through HPLC analysis. HPLC analysis recommended that a considerable amount of the dye degrades in the existence of nitrate ion and alkali and additional peaks which may be of by-product were obtained. This leads to confirm the non identical values of single sphere and double sphere model in the occurrence of nitrate and an alkali. Rate of deletion of color showed a linear liaison with respect to water content below 30% and temperature between 20-40oC whereas an increase in the concentration of organic solvent showed the inhibition of dye decoloration at given optimum condition. Therefore study was restricted up to 30% of methanol binary mixtures. A mechanism of reduction of dye has been proposed based on verdict. en_US
dc.language.iso en en_US
dc.publisher Karachi: Pakistan Botanical Society, University of Karachi en_US
dc.subject Methylene green en_US
dc.subject EDTA, solvent en_US
dc.subject dielectric constant en_US
dc.subject single sphere complex en_US
dc.subject double sphere complex en_US
dc.subject HPLC en_US
dc.subject decoloration. en_US
dc.title Reduction of Methylene Green by EDTA: A relation between dielectric constant of medium and activated state en_US
dc.type Article en_US


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