Abstract
A simple solvent extraction procedure is reported for the sequential separation of mercury(II), cadmium(II) and zinc(II). Mercury is separated first using 1,3-diphenyl-2-thiourea in chloroform at an overall acidity of 0.3M HCl. Then cadmium separated using the same reagent at pH 10 into dichloromethane. The zinc which is remaining in the aqueous phase is then quantitatively extracted into toluene-cyclohexanol mixture using 2-mercaptobenzoxazole. Suitable stripping solutions have been proposed for the re-extraction of these metal ions for their subsequent estimations. The method has been made highly selective by the use of appropriate masking agents and has been applied in conjunction with estimation procedures for the determination of these metal ions in city waste incineration ash (CRM 176), mercuric chloride (A. R. grade) and in magnesium alloy samples.
Similar content being viewed by others
References
D. Singh, O. V. Singh, S. N. Tandon, J. Ind. Chem. Soc., 59 (1982) 1338.
A. K. Chakravarti, S. Mukherjee, M. K. Saha, T. Chakrabarty, Talanta, 31 (1984) 215.
A. Alian, A. M. Elkoz, S. Abd El Halem, J. Radioanal. Chem., 57 (1980) 373.
D. Singh, O. V. Singh, S. N. Tandon, Sep. Sci. Technol., 13 (1978) 625.
Y. Sasaki, Anal. Chim. Acta, 127 (1981) 209.
H. Irving, G. Andrews, E. J. Risdon, J. Chem. Soc., 537 (1959) 451.
A. Hideo, K. Hiroshi, Y. Eiji Chem. Lett., 4 (1978) 421.
K. De Anil, S. M. Khopkar, R. A. Chalmers, Solvent Extraction of Metals, VNR, London, 1970, p. 125.
S. R. Joshi, P. K. Srivatsava, S. N. Tandon, J. Radioanal. Chem., 13 (1973) 343.
B. Raman, V. M. Shinde, Analyst, 115 (1990) 93.
Foster Dee Snell, Photometric and Fluorometric Methods of Analysis: Metals, Part 1, Wiley-Interscience, New York, 1978, p. 112.
D. Sandhya, M. S. Subramanian, Radiochim. Acta, 65 (1994) 105.
D. Sandhya, S. Priya, M. S. Subramanian, J. AOAC Int., 79 (1996) 1205.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sandhya, D., Subramanian, M.S. Extractive separation of trace amounts of mercury, cadmium and zinc. J Radioanal Nucl Chem 224, 53–57 (1997). https://doi.org/10.1007/BF02034611
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02034611