Rapid speciation of iron by on-line coupling of short column capillary electrophoresis and inductively coupled plasma mass spectrometry with the collision cell technique

✍ Scribed by Bao-Hui Li; Xiu-Ping Yan

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 645 KB
• Volume: 30
• Category: Article
• ISSN: 1615-9306
• DOI: 10.1002/jssc.200600405

✦ Synopsis

Abstract

A method for rapid speciation analysis of iron was developed by on‐line coupling of short column capillary electrophoresis and inductively coupled plasma mass spectrometry. The collision cell technique was used to eliminate argon‐based polyatomic interferences and a Micromist nebulizer was employed to increase the nebulization efficiency. Rapid speciation analysis of Fe(II) and Fe(III) was achieved within 1 min by short column capillary electrophoresis in a 14 cm×50 μm id capillary at 28 kV voltage with a mixture of 15 mmol/L tris(hydroxymethyl)aminomethane + 1 mmol/L 1,10‐phenanthroline + 1 mmol/L EDTA (pH 8.6) as running electrolyte. The precisions (RSD, n = 5) of migration time and peak area for Fe(II) and Fe(III) were in the range of 1.0–2.6 and 1.9–3.9%, respectively. The limits of detection (3σ) of Fe(II) and Fe(III) were 10.0 and 8.3 μg/L, respectively.