The extraction equilibria of the ion associate of periodate with 1-(3,5-diamino-6-chloropyrazinecarboxyl) guanidine |
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Authors: | Aldhaheri S M |
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Institution: | Department of Chemistry, Faculty of Science, UAE University, P.O. Box 17551, Al-Ain, United Arab Emirates |
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Abstract: | The extraction equilibrium of the ion-associate of periodate with 1-(3,5-diamino-6-chloropyrazinecarboxyl) guanidine hydrochloride (DPG+Cl−) was investigated spectrophotometrically. The optimum conditions for the extraction of the ion associate DPG+·IO4− with cyclohexanone have been established. The ion association constants, β, KD and Kex and the molar absorpativity of the formed ion associate were determined. These values enable a convenient application of the investigated system for the extraction spectrophotometric determination of periodate ions in the aqueous media. The molar ratio of the ion associate was found to be 1:1 of periodate to the reagent DPG+Cl− at pH 4–5. |
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Keywords: | Extraction equilibrium Periodate DPG+Cl− Ion-associate |
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