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Determination of selenium in grains by hydride generation-ICP/MS

수소화물발생-유도결합플라즈마 질량분석법(HG-ICP/MS)을 이용한 곡류 중 셀레늄의 정량분석

  • Kim, Minkyung (Department of Chemistry Education, Korea National University of Education) ;
  • Jung, Jinok (Department of Chemistry Education, Korea National University of Education) ;
  • Pak, Yong-Nam (Department of Chemistry Education, Korea National University of Education)
  • 김민경 (한국교원대학교 화학교육학과) ;
  • 정진옥 (한국교원대학교 화학교육학과) ;
  • 박용남 (한국교원대학교 화학교육학과)
  • Received : 2012.10.30
  • Accepted : 2013.03.15
  • Published : 2013.04.25

Abstract

The purpose of this study is to determine the quantity of selenium in grains by hydride generation-inductively coupled plasma mass spectrometry. Two sample preparation methods, beaker and microwave digestions, are compared and the former shows better result. The optimum condition for hydride generation is 4.0 M for HCl, 3% for $NaBH_4$ with the sample flow of 0.6 mL/min. The detection limit is 0.02 ${\mu}g/kg$($3{\sigma}$) and improved by 10 times. Isobaric interferences on Se is removed by Octopole Reactoin Cell and $H_2$ (3.8 mL/min) shows better performance over He. However, in case Br exists in a matrix, $H_2$ could induce interferences on m/z 80 and 82 ($^{80}[BrH]^+$ and $^{82}[BrH]^+$). The accuracy of this experiment is examined successfully by analyzing several reference materials. The results for several domestic grain analysis show that the concentrations are between 12.7 ${\mu}g/kg$ and 29.6 ${\mu}g/kg$.

Acknowledgement

Supported by : 한국연구재단

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