Simple and Rapid Spectrophotometric Method for Determination of Uranium (VI) in Low Grade Uranium Ores Using Arsenazo (III)

Authors: 

Hassan Golmohammadi, Abbas Rashidi and Seyed Jaber Safdari

A simple and highly selective non-extractive spectrophotometric method is presented for the rapid determination of uranium in low grade uranium ores using arsenazo (III). The method is based on the complex formation of uranium (VI) with Arsenazo (III) at pH 2.0 ± 0.1 which showed maximum absorption at 651 nm. Uranium concentration of 10 µg g-1 with a molar absorptivity of 4.45104 mol-1cm-1 at 296 ± 2 K obeyed Beer’s law. Interferences caused by various metallic ions, such as Mn, Fe, Zn, Mo, Cr, Cu, Co, Ni, Zr, Pb, Al and Na were effectively masked by diethylenetriaminоpenta-acetic acid (DTPA) and tartaric acid. The proposed technique has been effectively applied to the determination of low levels of uranium in uranium leach liquors. The accuracy of the current method was checked by comparison with the results obtained by inductively coupled plasma-optical emission spectroscopy (ICP-OES).

[1] Yemalyanov V. and Yevstyukhin A.: Metalurgiya Yadernogo Topliva. Atomizdat, Moskwa 1969.
[2] Fujino O., Umetani S., Ueno E. et al.: Anal. Chim. Acta, 2000, 420, 65.
[3] Sen Gupta J. and Bertrand N.: Talanta, 1995, 42, 1595.
[4] Joannon S., Telouk P. and Pin C.: Spectrochim. Acta B, 1997, 52, 1783.
[5] Borai E. and Mady A.: Appl. Radiat. Isot., 2002, 57, 463.
[6] Liu B., Liu L. and Cheng J.: Talanta, 1998, 47, 291.
[7] Hirano Y., Ogawa Y. and Oguma K.: Anal. Sci., 2003, 19, 303.
[8] Marczenko Z.: Separation and Spectrophotometric Determination of Elements. Ellis Horwood, Chichester 1986.
[9] Onishi H.: Photometric Determination of Traces of Metals, Part IIB. John Wiley, New York 1989.
[10] Madrakian T., Afkhami A. and Mousavi A.: Talanta, 2007, 71, 610.
[11] Gupta K., Kulkarni P. and Singh R.: Talanta, 1993, 40, 507.
[12] Nakashima T., Yoshimura K. and Taketatsu T.: Talanta, 1992, 39, 523.
[13] Mori I., Fujita Y. and Kato K.: Talanta, 1989, 36, 688.
[14] Hung S., Qu C. and Wu S.: Talanta, 1982, 29, 629.
[15] Coronel F., Mareva S. and Yordanov N.: Talanta, 1982, 29, 119.
[16] Snell F.: Photometric and Fluorometric Methods of Analysis. John Wiley & Sons, New York 1978.
[17] Kantipuly C. and Westland A.: Talanta, 1988, 35, 1.
[18] Khan M.H., Hasany S. and Khan M.A.: J. Radioanal. Nucl. Chem., 1994, 188, 341.
[19] Park C., Huang H.Z. and Won K.: Bull. Korean Chem. Soc., 2001, 22, 1. 
[20] Rohwer H., Rheeder N. and Hosten E.: Anal. Chim. Acta, 1997, 341, 263.
[21] Savvin S.: Talanta, 1964, 3, 1.
[22] Burger K.: Organic Reagents in Metal Analysis. Hungarian Acad. of Sci., Budapest 1973.
[23] Strelow F., Kokot M., Van der Walt T. and Bhaga B.: J. S. Afr. Chem. Inst., 1976, 29, 97.
[24] Kuroda R., Kurosaki M., Hayashibe Y. and Ishimaru S.: Talanta, 1990, 37, 619.
[25] Kadam B., Maiti B. and Sathe R.: Analyst, 1981, 106, 724.
[26] Savvin S.: Talanta, 1961, 8, 673.
[27] Khan M.H., Ali A. and Khan N.N.: J. Radioanal. Nucl. Chem., 2001, 250, 353.
[28] Strelow F. and Van Der Walt T.: Talanta, 1979, 26, 537.
[29] Sun J., Chen X. and Hu Z.: Anal. Lett., 1994, 27, 1989.