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Issue 1, 2011
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Rapid speciation analysis of mercury by short column capillary electrophoresis on-line coupled with inductively coupled plasma mass spectrometry

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Abstract

A method for mercury high throughput rapid speciation analysis was developed by short column capillary electrophoresis (SC-CE) coupled with inductively coupled plasma mass spectrometry (ICP-MS). A MicroMist nebulizer was employed to increase the nebulization efficiency and a laboratory-made removable SC-CE-ICP-MS interface on the basis of cross design was applied to alleviate buffer contamination of ICP-MS. In less than 60 s, methylmercury (MeHg(I)) and inorganic mercury (Hg(II)) were separated in a 16 × 75 μm i.d. short fused-silica capillary at 21 kV, while a mixture of 30 mmol L−1boric acid + 5% (v/v) CH3OH (pH = 8.60) acted as running electrolyte. The precisions (RSD, n = 5) of migration time and peak area for MeHg(I) and Hg(II) were in the range of 1.4–2.6% and 3.3–3.4%, respectively. The limits of detection (3σ) mercury species were 9.7 μg L−1 and 12.0 μg L−1, respectively. The recoveries for Hg(II) and MeHg(I) were in the range of 96–107% and 99–105%.

Graphical abstract: Rapid speciation analysis of mercury by short column capillary electrophoresis on-line coupled with inductively coupled plasma mass spectrometry

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Publication details

The article was received on 05 Aug 2010, accepted on 24 Sep 2010 and first published on 12 Nov 2010


Article type: Paper
DOI: 10.1039/C0AY00480D
Citation: Anal. Methods, 2011,3, 116-121
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    Rapid speciation analysis of mercury by short column capillary electrophoresis on-line coupled with inductively coupled plasma mass spectrometry

    B. Li, Anal. Methods, 2011, 3, 116
    DOI: 10.1039/C0AY00480D

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