[Introduction of Analysis Case] Speciation Analysis of Inorganic Arsenic by LC-ICP-MS
Analysis of inorganic arsenic species using LC-ICP-MS.
Arsenic exists in various forms in nature, including in water and food. It can be detected using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), but the amount detected represents the total arsenic content, and it does not indicate the specific forms present. Arsenic compounds include inorganic arsenic and organic arsenic, making speciation analysis very important. In the case of arsenic analysis, connecting HPLC before ICP-MS allows for the separation of different forms using HPLC, enabling speciation analysis through detection by ICP-MS. The "Testing Methods for Pet Feed" established by the Food and Agricultural Materials Inspection Center (FAMIC) included a testing method using Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry for arsenic testing in 2018. This document presents examples of measuring inorganic arsenic in its trivalent and pentavalent forms as part of this testing method.
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