期刊
JOURNAL OF SEPARATION SCIENCE
卷 30, 期 6, 页码 916-922出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200600405
关键词
collision cell technique; hyphenated techniques; inductively coupled plasma mass spectrometry; iron speciation; short column capillary electrophoresis
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(H) and Fe(III) was achieved within 1 min by short column capillary electrophoresis in a 14 cm x 50 mu m 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 (3 sigma) of Fe(II) and Fe(III) were 10.0 and 8.3 mu g/L, respectively.
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