Speciation of oxidation states of elements by capillary electrophoresis

✍ Scribed by Marek Trojanowicz; Ewa Poboży; Gerald Gübitz

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 463 KB
• Volume: 26
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.200301451

✦ Synopsis

Abstract

Progress made in the last five years in the application of capillary electrophoresis methods to chemical speciation of elements is reported on the basis of over 100 literature references. The main trends observed include development of new on‐ and off‐capillary derivatization methods, application of new detection methods, and especially coupling of CE separation systems to powerful atomic spectroscopy and mass spectrometry instruments with various ionization techniques, providing either a sensitive element‐specific detection method or a third dimension for high performance separation. Besides numerous CZE and MEKC capillary electrophoresis methods only very few examples of CE speciation with capillary electrochromatography can be found. Concerning the chemical forms of elements determined, the new procedures developed are mostly focused on redox speciation of various oxidation states of elements, metal‐bound high molecular compounds, and organometallic species.