Determination of Arsenic, Lead and Selenium in Rice Flour by Graphite Furnace Atomic Absorption Spectrometry

흑연로원자흡수분광법에 의한 쌀분말시료중의 비소, 납, 셀레늄의 정량

  • Received : 1998.10.28
  • Published : 1999.04.25

Abstract

A graphite furnace atomic absorption spectrometry (GFAAS) with matrix modification has been used to determine trace amounts of arsenic, lead and selenium in rice flour samples. A mixed solution of palladium and magnesium nitrate was used as a matrix modifier to convert the analyte elements into a phase of higher thermostability and to increase the volatility of concomitants in graphite furnace. Matrix modification effects by the mixed solution were investigated for several elements (As, Cd, Cu, Pb, Se, Zn). It has been found that the matrix modifier substantially increase the pyrolysis and atomization temperature, and absorbance for As, Pb and Se. The concentration of As, Pb and Se in rice flour samples were determined by standard addition method with Zeeman background correction after microwave acid digestion. In this method the characteristic concentrations of As, Pb and Se are 26 ng/g, 18 ng/g, 24 ng/g on the basis of dry sample respectively.

Keywords

matrix modification;rice flour;graphite furnace atomic absorption spectrometry;arsenic;lead;selenium;palladium;magnesium nitrate

References

  1. Clinical Disorders of Fluid and Electrolyte Metabolism M. H. Maxwell;C. R. Kleema;R. G. Narins
  2. J. Anal. At. Spectrom. v.9 M. Veber;K. Cujes;S. Gomiscek
  3. Analyst v.115 K. McLaughlin;D. Dadgar;M. R. Smyth;D. McMaster
  4. J. Anal. At. Spectrom. v.10 A. Lasztity;A. Krushevska;M. Kotrebai;R. M. Barnes;D. Amarasiriwardena
  5. At. Absorpt. NewsL. v.14 R. D. Ediger
  6. Anal. Chem. v.47 E. L. Henn
  7. At. Spectrosc. v.3 W. Slavin;G. R. Carnrick;D. C. Manning
  8. Anal. Chem. v.54 W. Slavin;G. R. Carnrick;D. C. Manning
  9. Spectrochim. Acta v.41B G. Schlemmer;B. Welz
  10. Certificate of Analysis, Standard Reference Material 1568a National Bureau of Standards
  11. CRC Handbook of Chemistry and Physics, (67th Ed.) R. C. Weast
  12. Spectrochim. Acta v.39B B. Welz;G. Schlemmer;U. Voellkopf
  13. J. Anal. At. Spectrom. v.7 B. Welz;G. Schlemmer;J. R. Mudakavi
  14. Analyst v.120 M. E. Soares;M. L. Bastos;M. Ferreira
  15. J. Assoc. Off. Anal. Chem. v.61 J. Flanzak
  16. J. Radioanal. Nucl. Chem. v.179 D. A. Becker;D. L. Anderson;R. M. Lindstrom;R. R. Greenberg;K. M. Garrity;E. A. Mackey
  17. Talanta v.29 H. Robberech;R. Van Grieken
  18. Acta. Chem. Sin. v.39 X.-Q. Shan;Z.-M. Ni
  19. Guide to the Expression of Uncertainty in Measurement, (1st Ed.) ISO
  20. Anal. Sci. & Technol. v.11 K. H. Cho;C. J. Park;J. C. Woo;J. K. Suh;M. S. Han;J. H. Lee
  21. J. Anal. At. Spectrom. v.10 I. Harrison;D. Lillejohn;G. S. Fell
  22. At. Spectrosc. v.2 E. J. Hinderberger;M. L. Kaiser;S. R. Koirtyohann
  23. Spectrochim. Acta v.46B H. Qiao;K. W. Jackson
  24. J. Anal. At. Spectrom. v.7 B. Welz;G. Schlemmer;J. R. Mudakav