Simultaneous determination of arsenic, selenium and antimony species using HPLC/ICP-MS |
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| Authors: | T. Lindemann A. Prange W. Dannecker B. Neidhart |
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| Affiliation: | GKSS Research Centre, Institute of Physical and Chemical Analytics, Max-Planck-Strasse, D-21502 Geesthacht, Germany, DE
University of Hamburg, Institute for Inorganic and Applied Chemistry, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany, DE
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| Abstract: | A new method for the simultaneous separation and determination of four arsenic species [As(III), As(V), monomethylarsonic acid and dimethylarsinic acid], three selenium species [Se(IV), Se(VI) and selenomethionine] as well as Sb(III) and Sb(V) is presented. The speciation was achieved by on-line coupling of anion exchange high-performance liquid chromatography (HPLC) with inductively coupled plasma mass spectrometry (ICP-MS). Chromatographic parameters such as the composition and pH of the mobile phase were optimised. Limits of detection are below 4.5 μg L–1 (as element) for Sb(III) and the selenium species and below 0.5 μg L–1 for the other species. Precisions of retention times were better than 2% RSD and of peak areas better than 8% RSD for all the species investigated. |
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