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Improvement of speciation analysis in environmental matrices. Identification of refractory arsenicals—some analytical difficulties |
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| Authors: | Alexandre M M de Bettencourt Maria Helena F S Florêncio Luis Filipe Vilas-Boas |
| Institution: | (1) Direcção-Geral dos Recursos Naturais Laboratório do P.G.I.R.H./T. Edificio dos Armadores, Porta-2, 1400 Lisboa, Portugal;(2) Departamento de Ecologia, Universidade de Évora Largo dos Colegiais, 7001 Évora, Portugal;(3) Centro de Espectrometria de Massa Complexo Interdisciplinar da Universidade de Lisboa Av., Rovisco Pais, 1200 Lisboa, Portugal;(4) Centro de Tecnologia Química e Biológica Estação Agronómica Nacional, 2870 Oeiras, Portugal |
| Abstract: | Arsenic species that do not form hydrides have been recently put in evidence in coastal seawater. This paper describes the procedures used in the first attempts to concentrate, purify and identify these forms as well as the difficulties that make this identification problematic. The rationale behind a new scheme under investigation based on solvent extraction/high-performance liquid chromatography/dynamic-flow-fast-atom-bombardment mass spectrometry is presented. Some alternatives that seem promising for the future are indicated. |
| Keywords: | arsenic speciation refractory identification |
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