Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Accurate Analysis of Chromium in Foodstuffs by Using Inductively Coupled Plasma Mass Spectrometry with a Collision-Reaction Interface

  • Lee, Seung Ha (Department of Environmental Health, College of Health Sciences, Korea University) ;
  • Kim, Ji Ae (Department of Environmental Health, College of Health Sciences, Korea University) ;
  • Choi, Seung Hyeon (Department of Environmental Health, College of Health Sciences, Korea University) ;
  • Kim, Young Soon (Department of Food and Nutrition, College of Health Sciences, Korea University) ;
  • Choi, Dal Woong (Department of Environmental Health, College of Health Sciences, Korea University)
  • Received : 2013.01.02
  • Accepted : 2013.03.13
  • Published : 2013.06.20
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Abstract

Food is a common source of chromium (Cr) exposure. However, it is difficult to analyze Cr in complex food matrices by using inductively coupled plasma mass spectrometry (ICP-MS) because the major isotope, $^{52}Cr$, is masked by interference generated by the sample matrix and the plasma gas. Among the systems available to minimize interference, the recently developed collision-reaction interface (CRI) has a different structure relative to that of other systems (e.g., collision cell technology, octopole reaction system, and dynamic reaction cell) that were designed as a chamber between the skimmer cone and quadrupole. The CRI system introduces collision or reaction gas directly into the plasma region through a modified hole of skimmer cone. We evaluated the use of an CRI ICP-MS system to minimize polyatomic interference of $^{52}Cr$ and $^{53}Cr$ in various foodstuffs. The $^{52}Cr$ concentrations measured in the standard mode were 2-3 times higher than the certified values. This analytical method based on an ICP-MS system equipped with a CRI of helium gas was effective for Cr analysis in complex food matrices.

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