Determination of Trace Bismuth in Urine and Tap Water Samples by Atomic Absorption Spectrometry after Solid-Phase Extraction

Abstract:

In this paper, a new method for the determination of bismuth in urine and tap water is described. The methodology combines determined using a hydride generation-atomic absorption spectrometry (HG-AAS) with pre-concentration of the bismuth on the modified organobentonite by dithizone (D-O-bentonite). Optimal experimental conditions for the adsorption and elution of the bismuth, including pH, contact time, eluent concentration, eluent volume and co-existing ions have been investigated. The result showed that the bismuth ion could be adsorbed on the D-O-bentonite. The adsorbed quantitive was affected by the pH value and contact time. In the medium of pH 5.0, the shaking time was 10 min, the adsorption capacity was 15.2 mg·g^-1. The bismuth adsorbed on the modified organobentonite by dithizone could be completely eluated by using 2 mol·L^-1 HNO₃. The method has been applied to the pre-concentration/separation of bismuth in the human urine and tap water samples with satisfied results.

• Periodical: Advanced Materials Research (Volumes 230-232)
• Pages: 884-887
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.230-232.884
• Online since: May 2011
• Authors: Dong Zhang
• Keywords: Bismuth, Dithizone, Organophilic Bentonite, Solid-Phase Extraction (SPE), Surface Modification, Urine, Water

References

[1] D.W. Thomas, in: E. Merian (Ed. ), Metals and Their Compounds in the Environment, VCH, Weihneim, 1991, p.789–801.

[2] M. Burguera, J.L. Burguera, C. Rondon, M.I. Garcia, J. Anal. At. Spectrom. Vol. 16 (2001), p.1190.

[3] Z. Marczenko, Separation and Spectrophotometric Determination of Elements, Ellis Horwood, London, (1986).

[4] J. Marrero, S.P. Arisnabarreta, P. Smichowski, J. Anal. At. Spectrom. Vol. 14 (1999), p.1875.

[5] O. Acar, Z. Kilic, A.R. Turker, Anal. Chim. Acta Vol. 382 (1999), p.329.

[6] A.S. Ribeiro, M.A.Z. Arruda, S. Cadore, Spectrochim. Acta B, Vol. 57 (2002), p.2113.

[7] L. Rahman, W.T. Corns, D.W. Bryce, P.B. Stockwell, Talanta Vol. 52 (2000), p.833.

[8] L. Zhang, Y. Lu, G. Yang, Huaxue Fence Vol. 36 (2000), p.26.

[9] M.V. Hinds, D.C. Gregoie, E.A. Ozaki, J. Anal. At. Spectrom. Vol. 12 (1997), p.131.

[10] P. Ostapczuk, Anal. Chim. Acta Vol. 273 (1993), p.35.

[11] H. -Y. Yang, W. -Y. Chen, I. -W. Sun, Talanta Vol. 50 (1999), p.977.

[12] T. Ferri, S. Paci, R. Morabito, Anal. Dichim. 89 (1996) 245.

[13] R. Hajian, E. Shams, Anal. Chim. Acta Vol. 491 (2003), p.63.

[14] S.G. Sarkar, P.M. Dhadke, Sep. Purif. Technol. Vol. 15 (1999), p.131.

[15] N. Tokman, S. Akman, M. Ozcan, Talanta, Vol. 59 (2003), p.201.

[16] D. Zhang, J. Zhang, L. Z. Xu, G.J. Ren, Metal. Anal., Vol. 28(2008), p . 57.

[17] D. Zhang, G.J. Ren, L. Z. Xu, J. Chem. Indust. Eng., Vol. 59(2008), p.1535.