Abstract.
Certified reference materials (JMS-2 and JMS-1 – Marine sediment, LKSD-1 Lake Sediment, and STSD-1 Stream Sediment) and bottom sediment were analysed for arsenic by hydride generation atomic absorption spectrometry (HG-AAS) after digestion by different methods (microwave digestion, digestion in aluminium block, dry digestion) and different combinations of acids (HNO3, HCl, HClO4, H2SO4). The study revealed that both wet and dry digestion can be used to digest the reference materials and bottom sediment. Exceptionally satisfactory results were produced by the application of aqua regia, HNO3 + HCl + HClO4, and HNO3 + HCl mixtures. Addition of Mg(NO3)2 during dry digestion caused an increase in arsenic recovery in the reference materials and improved the accuracy of arsenic determination in the bottom sediments.
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Loska, K., Wiechuła, D. Comparison of Sample Digestion Procedures for the Determination of Arsenic in Bottom Sediment Using Hydride Generation AAS. Microchim Acta 154, 235–240 (2006). https://doi.org/10.1007/s00604-006-581-2
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DOI: https://doi.org/10.1007/s00604-006-581-2