Spectrophotometric determination of platinum(IV) in alloys, complexes, environmental, and pharmaceutical samples using 4-[N,N-(diethyl)amino] benzaldehyde thiosemicarbazone
| Autor: | P. Parameshwara Naik, J. Karthikeyan, A. Nityananda Shetty |
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| Rok vydání: | 2009 |
| Předmět: |
Thiosemicarbazones
Metal ions in aqueous solution Inorganic chemistry chemistry.chemical_element Management Monitoring Policy and Law Catalysis Absorbance Benzaldehyde chemistry.chemical_compound Spectrophotometry medicine Alloys Humans General Environmental Science Platinum medicine.diagnostic_test Chemistry Temperature Water General Medicine Molar absorptivity Pollution Pharmaceutical Preparations Reagent Environmental Pollutants |
| Zdroj: | Environmental monitoring and assessment. 171(1-4) |
| ISSN: | 1573-2959 |
| Popis: | 4-[N,N-(Diethyl)amino] benzaldehyde thiosemicarbazone (DEABT) is proposed as an analytical reagent for the spectrophotometric determination of platinum(IV). The DEABT forms 1:2 yellow complex with Pt(IV), which is sparingly soluble in water and completely soluble in water-ethanol-DMF medium. The Pt(IV)-DEABT complex shows maximum absorbance at 405 nm. Beer's law is valid up to 7.80 μg cm(-3), and optimum concentration range for the determination of platinum(IV) is 0.48-7.02 μg cm(-3). The molar absorptivity and Sandell's sensitivity of the method are found to be 1.755 × 10(4) dm(3) mol(-1) cm(-1) and 0.0012 μg cm(-2), respectively. The relative error and coefficient of variation (n=6) for the method does not exceed ± 0.43% and 0.35%, respectively. Since the method tolerates a number of metal ions commonly associated with platinum, it can be employed for the determination of platinum in environmental samples, pharmaceutical samples, alloys, catalysts, and complexes. The method is rapid as the Pt(IV)-DEABT complex is soluble in water-ethanol-DMF medium and not requiring any time consuming extraction method for the complex. |
| Databáze: | OpenAIRE |
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