| Autor: |
Pradhan SK; Chemical Laboratory, Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Eastern Region, Khasmahal, Jamshedpur, 831002, India. skpradhan.amd@gov.in., Ambade B; Department of Chemistry, National Institute of Technology, Jamshedpur, 831014, India. |
| Jazyk: |
angličtina |
| Zdroj: |
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry [Anal Sci] 2020 Feb 10; Vol. 36 (2), pp. 207-211. Date of Electronic Publication: 2019 Sep 13. |
| DOI: |
10.2116/analsci.19P216 |
| Abstrakt: |
A simple and rapid solid phase extraction (SPE) procedure has been developed for the extraction and determination of uranium in water samples. The method is based upon the adsorption of uranium(VI)-2,3-dihydroxynaphthalene complex on microcrystalline naphthalene at the pH range 10 - 12 in the presence of a counter cation cetyltrimethylammonium ion. The solid mass consisting of uranium-2,3-dihydroxynaphthalene-CTA complex and naphthalene is ignited in the furnace at a temperature of 700°C for 1 h and then digested in dil. HNO 3 solution. Uranium is then determined by LED fluorimetry using fluorescence enhancing pyrophosphate buffer. The effects of different variables like pH of the solution, reagent concentrations, counter cations, stirring time, interfering ions etc. have been investigated thoroughly for the quantitative recovery of uranium. The accuracy of the developed method has been ascertained by standard addition method as well as conventional pellet fluorimetry method involving co-precipitation of uranium using aluminum phosphate as a carrier. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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