Separation of arsenic species by ion-pair and ion exchange high performance liquid chromatography |
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Authors: | Erik H. Larsen Steen Honoré Hansen |
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Affiliation: | (1) National Food Agency of Denmark, 19 Mørkhøj Bygade, DK-2860 Søborg, Denmark;(2) Royal Danish School of Pharmacy, 2 Universitetsparken, DK-2100 Copenhagen, Denmark |
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Abstract: | Arsenite, arsenate, monomethylarsonate, dimethylarsinate, arsenobetaine, arsenocholine and the tetramethylarsonium ion were subjected to ion-exchange and ion-pair reversed phase HPLC. The ion exchange method was superior in selectivity and time of analysis for the arsenic anions. The ammonium ions used for the ion-pair method only resulted in separation of some of the anionic arsenic compounds. Flame atomic absorption spectrometry was used for on-line arsenic-specific detection. |
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Keywords: | arsenic speciation ion-pair HPLC ion exchange HPLC flame atomic absorption spectrometry |
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