Adsorption and Preconcentration Capabilities of Nano-Barium-Strontium Titanate Powder Coated by Dithizone for Trace Bismuth

Abstract:

A new method for the adsorption and preconcentration of bismuth in urine was described. The methodology combines determined using a hydride generation-atomic absorption spectrometry (HG-AAS) with pre-concentration and separation of the bismuth on the nano-barium-strontium titanate powder coated by dithizone (BST-dithizone). The experimental conditions for the pre-concentration and separation of the bismuth, including pH value of the medium, shaking time, eluent condition and co-existing ions have been investigated. The result showed that the bismuth in urine could be adsorbed on the BST-dithizone. The adsorption percentage was affected by the pH value of medium and shaking time. In the medium of pH 6.0, the adsorption capacity of BST-dithizone to bismuth (III) was 13.4 mg·g^-1 when the shaking time was 10 min. The bismuth adsorbed on the BST-dithizone could be completely eluated by 2 mol·L^-1 HNO₃. The enrichment factor was 100. The detection limit of bismuth (III) was 5.1 ng·L⁻¹.The method has been applied to the pre-concentration and separation of bismuth in the human urine and tap water with satisfied results.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 3504-3507
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.3504
• Online since: July 2011
• Authors: Dong Zhang
• Keywords: Adsorption, Bismuth, Dithizone, Nano-Barium-Strontium Titanate, Preconcentration

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), pp.1190-1196.

[3] A.S. Ribeiro, M.A.Z. Arruda, S. Cadore, Spectrochim. Acta B, Vol. 57 (2002), pp.2113-2118.

[4] S.G. Sarkar, P.M. Dhadke, Sep. Purif. Technol. Vol. 15 (1999), pp.131-136.

[5] N. Tokman, S. Akman, M. Ozcan, Talanta, Vol. 59 (2003), pp.201-208.

[6] D. Zhang, H. D. Su, H. Gao, Spectrosc. Spect. Anal. 28(2008), pp.693-696. in chinese.

[7] D. Zhang, H. D. Su, H. Gao, J.C. Liu, Acta Chim. Sinica 65(2007), pp.2549-2554. in chinese.