Abstracts
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.
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Original Russian Text © T.N. Simonova, V.A. Dubrovina, 2014, published in Zhurnal Analiticheskoi Khimii, 2014, Vol. 69, No. 9, pp. 927–932.
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Simonova, T.N., Dubrovina, V.A. Separation of vanadium(IV) from vanadium(V) and its determination in the presence of thiocyanate ions using two-phase aqueous systems. J Anal Chem 69, 845–850 (2014). https://doi.org/10.1134/S1061934814070132
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DOI: https://doi.org/10.1134/S1061934814070132