Separation of vanadium(IV) from vanadium(V) and its determination in the presence of thiocyanate ions using two-phase aqueous systems
| Autor: | T. N. Simonova, V. A. Dubrovina |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Detection limit
Aqueous solution medicine.diagnostic_test Thiocyanate Inorganic chemistry Extraction (chemistry) Vanadium chemistry.chemical_element Polyethylene glycol Analytical Chemistry law.invention chemistry.chemical_compound chemistry law Spectrophotometry medicine Atomic absorption spectroscopy |
| Zdroj: | Journal of Analytical Chemistry. 69:845-850 |
| ISSN: | 1608-3199 1061-9348 |
| DOI: | 10.1134/s1061934814070132 |
| Popis: | A two-phase system of polyethylene glycol PEG-1500 (C2H5OH, C3H7OH)-ammonium sulfate-water is proposed for the selective extraction and spectrometric determination of vanadium(IV) as its thiocyanate complex. The conditions of the separation of vanadium(IV) from vanadium(V) are optimized using polyethylene glycol or water soluble alcohols. The detection limit for vanadium(IV) in extractionatomic absorption determination is 2.8 μg/L and in combined photometric determination with chromazurol S, 10 μg/L. The methods are tested on mine, waste, and river waters. The relative standard deviation does not exceed 7%. The duration of analysis is 20 min. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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