Studies on Determination of trace amount of Se in Volcanic Rocks by Atomic Absorption Spectrophotometry

원자 흡수 분광광도법에 의한 화산암중 극미량의 Se정량에 관한 연구

  • Received : 1999.05.10
  • Published : 1999.12.25


The extraction of trace amounts of Se in volcanic rock was investigated using the hydride generation method and atomic absorption spectrophotometry. The powdered rock, 1.0 g, was decomposed with the mixture of $HClO_4$, $HNO_3$ and HF in an acid digestion bomb at $140^{\circ}C$ for 2 hours. For the reduction of Se(VI) to Se(IV) in the solution, 10 mL of 6 M HCl and 0.2 mL of 1 M KBr were added to the solution and the mixture was heated for 30~45 minutes. $H_2Se$ was produced by adding 3% $NaBH_4$ as a strong reducing agent, extracted by nitrogen gas, and was absorbed twice into $KMnO_4$solution. The contents of Se in the solution were determined by generation/AAS. According to the proposed method, 1.0 ng or more of Se was quantitatively extracted and Se levels of 2.5 ng/g or more in rock samples could be determined. For example, Se in a rhyolite was determined with the precision of $19.5{\pm}1.3ng/g$(95% confidence, n=6).


  1. Bull. chem. soc. Jpn. v.63 Y. Tamari;H. Ogawa;Y. Fukumoto;H. Tsuji;Y. Kusaka
  2. Talanta v.26 S. Forkes;G. P. Bound;T. S. West
  3. Bunseki v.6 山田秀和
  4. Bunseki v.1 木村修
  5. Science v.128 O. H. Muth;J. E. Oldfield;L. F. Remmert;J. R.Schubert
  6. J. Anim. Sci. v.16 R. O. Eggert;E. Patterson;W. T. Akers;E. L. R. Stokstad
  7. Jpn. Circul. J. v.46 W-H. Yu
  8. Chinese Med. J. v.92 Keshan Disease Research Council
  9. Anal. Chem. v.50 S. Bajo
  10. Anal. Chim. Acta v.86 S. Terashina
  11. Bunseki Kagaku v.41 山谷和久;靑大俊之;金溢勇
  12. Fresenius Z. Anal. Chem. v.316 S. E. Raptis;G. Kaiser;G. Tolg
  13. Analyst v.99 K. C. Thompson;R. D. Thomerson
  14. Anal. Chem. v.56 H. Narasaki;M. Ikda
  15. Anal. Chim. Acta v.120 P. N. Vijan;D. Leung