Extraction of Ultra Trace Amounts Bismuth in Water Samples Using Cloud Point Extraction with 2-Amino-Cyclopentene-1-Dithiocarboxylic Acid

Author

Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Varamin, Iran

Abstract

A new approach for a cloud point extraction-electrothermal atomic absorption spectrometric method was used for determining bismuth. The aqueous analyte was acidified with sulfuric acid (pH 3.0–3.5). Triton X-114 was added as a surfactant and 2-amino-cyclopentene-1-dithiocarboxylic acid was used as a complexing agent. After phase separation at 50 ◦C based on the cloud point separation of the mixture, the surfactant-rich phasen was diluted using tetrahydrofuran (THF). Twenty microliters (20 μL) of the enriched solution and 10 µl of 0.1% (w/v) Pd (NO3)2 as chemical modifier were dispersed into the graphite tube and the analyte was determined by electrothermal atomic absorption spectrometry. After optimizing extraction conditions and instrumental parameters, a preconcentration factor of 195 was obtained for a sample of only 10 mL. The detection limit was 0.04 ng ml−1 and the analytical curve was linear for the concentration range of 0.04–0.70 ng mL−1. Relative standard deviations were <5%. The method was successfully applied for the extraction and determination of bismuth in water samples. 

Keywords

References

  1. Acar O., A. R. Türker and Z. Kilic, 1997.
  2. Fresenius, J. Anal. Chem. 357 , 656-661.
  3. Bertholf R. L. and B.W. Renoe, 1982. Anal. Chim.
  4. Acta 139, 287-295.
  5. Burguera M., J.L. Burguera, C. Rondon and M.I.
  6. Garcia, 2001. J. Anal. At. Spectrom. 16, 1190-
  7. Garrido M., M. S. Di Nezio, A. G. Lista, M. B. S.
  8. Palomeque and Fernández Band, 2004. Anal.
  9. Chim. Acta 502,173-180.
  10. Bi with CPE Bi without CPE
  11. Concentration rang (ng mL-1) 0.04-0.70 4-110
  12. Slope 0.756 0.0038
  13. Intercept 0.018 0.004
  14. Correlation coefficient(R) 0.9993 0.9994
  15. R.S.D.(%) (n= 5)a 4.0 4.7
  16. LOD(ng ml-1)b 0.04 1.5
  17. Enhancement factorc 195 -
  18. Havezov I., A. Detcheva and Rendl,
  19. J.Mikrochim. Acta 119 ,147-153.
  20. He B. and Z.-M., Ni, 1996. J. Anal. At. Spectorm.
  21. , 165-172.
  22. Imai S., N. Hasegawe, Y. Nishiyama, Y. Hayashi
  23. and K. Satio, 1996. J. Anal. At. Spectrom. 11 ,
  24. -609.
  25. Manzoori J. L. and G. Karim-Nezhad, 2003. Anal.
  26. Sci. 19,579-585.
  27. Marczenko Z., 1986. Separation and
  28. Spectrophotometric Determination of Elements,
  29. Ellis Horwood, Chichester, UK, p. 169-
  30. Moghimi A. and R.Ghiasi, 2008. Journal of the
  31. Korean Chemical Society, Vol. 52,No. 4
  32. Moghimi A., 2007. Chinese Journal of Chemistry
  33. Vol. 25, Issue 12,1842-1847.
  34. Shan, X.-Q. and B. Wen, 1995. J. Anal. At.
  35. Spectrom. 10, 791-796.
  36. Wei-Ming, Y. and N. Zhe-Ming, 1997.
  37. Spectrochim. Acta B 52, 241

Files

History

  • Receive Date: 10 March 2012
  • Revise Date: 24 January 2022
  • Accept Date: 29 October 2018

Share

How to cite

Statistics