AU165: Separation of Chromium (III) and Chromium (VI) by Ion Chromatography

Instrument Type: IC

This application update demonstrates separation and detection of Cr(III) and Cr(VI) using a Dionex IonPac CS5A column and absorbance detection. This method also describes a sample preparation technique that can be used to estimate the concentrations of Cr(III) and Cr(VI) in soil and wastewater samples.

AN43098: Speciation analysis of Cr (III) and Cr (VI) in drinking waters using anion exchange chromatography coupled to ICP-MS

Instrument Type: IC

Speciation determinations of ionic compounds are important to determine the concentration of the more toxic form in the total elemental composition. Chromium is an industrial waste contaminant that can have serious health effects and therefore requires monitoring in municipal water systems. This method determines Chromium VI and Chromium III species in a municipal drinking water sample. The ions are separated by ion chromatography (IC) on an IonPac AG7 guard column and detected by Inductively Coupled Plasma Mass Spectrometry (ICP-MS) at ng/g. This method is further optimized in AN43175.

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.