AN1079: Simultaneous Determination of Trivalent Chromium and Hexavalent Chromium Using Accelerated Solvent Extraction and Ion Chromatography

Instrument Type: IC

Chromium mainly occurs in trivalent chromium (Cr(III)) and hexavalent chromium (Cr(VI)) forms. Due to highly oxidizing properties and high skin permeability, Cr(VI) is extremely toxic. The limit for Cr(VI) is low in all industries, such as 0.005 mg/kg in toy industry according to the European Union’s Toy Safety Directive of 2009 (2009/48/EC). This application determines Cr(III) and Cr(VI) simultaneously and is an improvement over TN24. Accelerated solvent extraction is used to extract both Cr(III) and Cr(VI), and to derivatize Cr(III) to achieve a simpler and faster detection.