Accurate Analysis of Chromium in Foodstuffs by Using Inductively Coupled Plasma Mass Spectrometry with a Collision-Reaction Interface

作者：Lee Seung Ha; Kim Ji Ae; Choi Seung Hyeon; Kim Young Soon; Choi Dal Woong^*

来源：BULLETIN OF THE KOREAN CHEMICAL SOCIETY, 2013, 34(6): 1689-1692.

DOI：10.5012/bkcs.2013.34.6.1689

• Chromium
• ICP-MS
• Collision-reaction interface
• Food

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, Cr-52, 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 Cr-52 and Cr-53 in various foodstuffs. The Cr-52 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.

• 出版日期2013-6-20