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Direct determination of arsenic in sea water by electrothermal atomization atomic absorption spectrometry using D2 and Zeeman background correction

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Abstract

Arsenic in sea water was determined directly by graphite furnace atomic absorption spectrometry (GFAAS) using palladium nitrate as chemical modifier, at an optimum concentration of 15 mg l−1. Deuterium and Zeeman effect background correction were compared and gave detection limits of 0.6 and 0.8 μg l−1, respectively. Precisions between 8 and 2%, for both correctors, were obtained with an injection volume of 40 μl. The accuracy obtained with different reference materials: CRM-403 (1.461 μg kg−1), NASS-4 (1.26 ±0.09 μgl−1) and IAEA/W-4 (24–31 μg l−1) was studied for large injection volumes for both background correction systems. Interferences by chloride, sodium, potassium, calcium and silicon were removed by Zeeman correction, whereas deuterium correction was much less effective and was insufficiently accurate for sea water samples.

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Authors and Affiliations

  1. Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Chemistry, University of Santiago de Compostela, 15706, Santiago de Compostela, Spain

    Pilar Bermejo-Barrera, Jorge Moreda-Piñeiro, Antonio Moreda-Piñeiro & Adela Bermejo-Barrera

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  1. Pilar Bermejo-Barrera
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  2. Jorge Moreda-Piñeiro
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  3. Antonio Moreda-Piñeiro
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  4. Adela Bermejo-Barrera
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Bermejo-Barrera, P., Moreda-Piñeiro, J., Moreda-Piñeiro, A. et al. Direct determination of arsenic in sea water by electrothermal atomization atomic absorption spectrometry using D2 and Zeeman background correction. Mikrochim Acta 128, 215–221 (1998). https://doi.org/10.1007/BF01243052

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  • DOI: https://doi.org/10.1007/BF01243052

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