Studies on the Releasing Effect of Cerium in Calcium Analysis by Atomic Absorption Spectrometry

원자흡수 분광법에 의한 칼슘분석에서 세륨의 해방효과에 관한 연구

  • Kee Chae Park (Department of Chemistry, Korea University) ;
  • Hee Seon Choi (Department of Chemistry, Korea University) ;
  • Soo Han Kwon (Department of Science education, Kyeong-Sang National University)
  • 박기채 (고려대학교 이과대학 화학과) ;
  • 최희선 (고려대학교 이과대학 화학과) ;
  • 권수한 (경상대학교 사범대학 과학교육과)
  • Published : 1985.04.20


In the atomic absorption spectrometry using an air-acetylene flame, the interferences of Zr, Sn, Al, Sb, $SO_4^{2-},\;VO_3^-,\;and\;SiO_3^{2-}$, on the calcium absorption and the repression of this interference by the addition of cerium have been studied. The interference by Zr, Sn, Al, Sb, $SO_4^{2-},\;VO_3^-,\;and\;SiO_3^{2-}$ existed as the same concentration as calciurn ($3.0 {\times} 10^{-4}$M) in the sample solution are completely released by the addition of cerium twice as much as interfering cation. The interferences by the mixed interfering cations (Zr, Sn, Al and Sb) and by the mixed interfering anions ($SO_4^{2-},\;VO_3^-,\;and\;SiO_3^{2-}$) are larger than by each interfering cation and anion, and the releasing effect by cerium ($1.5 {\times} 10^{-2}$M) is effective up to some degree of the concentration of mixed interfering cations and of mixed interfering anions. The releasing effect by cerium to the mixed solution of interfering cations and anions is applicable to quite wide range of concentration.



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