| Autor: | V. Krishna Reddy, P. Raveendra Reddy, S. Sivaramaiah, T. Sreenivasulu Reddy |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Analytical chemistry Thorium chemistry.chemical_element Hydrazone Derivative Molar absorptivity Pollution Analytical Chemistry Ion Absorbance Metal Nuclear Energy and Engineering chemistry visual_art visual_art.visual_art_medium Radiology Nuclear Medicine and imaging Absorption (chemistry) Spectroscopy |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 247:239-239 |
| ISSN: | 0236-5731 |
| DOI: | 10.1023/a:1006728912624 |
| Popis: | A simple and sensitive spectrophotometric method is developed for the determination of throium in aqueous medium. The metal ion forms yellow coloured complex with 2,4-dihydroxybenzaldehyde isonicotinoyl hydrazone (2,4-DHBINH) in the pH range 2.0–8.0. The complex shows an absorption maximum at 390 nm. The absorbance of the complex is maximum at pH 5.5 Beer's law is obeyed in the range 0.30–7.00 μg/ml of thorium(IV). The molar absorptivity and the Sandell's sensitivity of the method are 2.20· 104 l·mol−1·cm−1 and 0.0106 μg/cm−2, respectively. The interference of various ions was studied. The composition of the complex is 1:1 {Th(IV) : 2,4-DHBINH}. The first derivative spectrum of the complex shows a zero cross at 391.2 nm and maximum amplitude at 415 nm. Thus a sensitive derivative spectrophotometric method for the determination of Th(IV) is proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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