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      Analysis of Mercury-Rich plants and mine tailings using the Hydride-Generation AAS method

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          Abstract

          A hydride-generation atomic absorption spectroscopy (AAS) method was developed for the analysis of total Hg in liquid matrices of mercury-rich plants and mine tailings samples. The detection limit for this method was as low as 11.4 ng/mL. The reproducibility of the mercury signals (in terms of relative standard deviation) was 4.6%. Accuracy of the method was verified by analyses of deionised water samples spiked with HgCl2 and HgNO3. Recovery values for total mercury ranged from 88.5 to 94.3% for both mercury species added. An external certified laboratory validated the analytical method with a maximum discrepancy of 15 %. Optimal analytical response of the equipment for Hg analysis of plant samples was achieved when the sample volume added to the reaction vessel was 0.25 mL.

          Translated abstract

          Um protocolo para análise do mercúrio (Hg) em amostras líquidas de solo e tecidos vegetais enriquecidos com Hg foi desenvolvido com base na técnica de geração de hidretos. O limite de detecção para este método foi de 11.4 ng/mL. A reproducibilidade do método (calculado com base no desvio padrão relativo) foi de 4.6%. A precisão do método foi verificada pela análise de amostras de água deionizada contendo HgCl2 and HgNO3. Os valores de mercúrio total recuperados variaram de 88.5 a 94.3% para ambas as espécies testadas. O método analítico foi validado por um laboratório externo certificado com discrepância máxima de 15 %. O desempenho analítico do equipamento para análise do mercúrio em tecidos vegetais foi considerado ótimo para volumes de amostra de até 0.25 mL.

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          Most cited references14

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          Abandoned artisanal gold mines in the Brazilian Amazon: A legacy of mercury pollution

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            Plants that Hyperaccumulate Heavy Metals

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              Induced plant uptake and transport of mercury in the presence of sulphur-containing ligands and humic acid

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                Author and article information

                Journal
                babt
                Brazilian Archives of Biology and Technology
                Braz. arch. biol. technol.
                Instituto de Tecnologia do Paraná - Tecpar (Curitiba, PR, Brazil )
                1516-8913
                1678-4324
                August 2009
                : 52
                : 4
                : 953-960
                Affiliations
                [01] São Paulo SP orgnameCompanhia de Tecnologia de Saneamento Ambiental do Estado de São Paulo orgdiv1Setor de Águas Subterrâneas e do Solo Brasil
                [02] Palmerston North orgnameMassey University orgdiv1Institute of Natural Resources orgdiv2Soil and Earth Science New Zealand
                [03] Canterbury orgnameLincoln University orgdiv1Agriculture and Life Sciences Division New Zealand
                Article
                S1516-89132009000400019 S1516-8913(09)05200419
                10.1590/S1516-89132009000400019
                5827c3f2-1b19-4fec-94fd-05da331a5f70

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 14 March 2007
                : 23 December 2008
                : 20 March 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 16, Pages: 8
                Product

                SciELO Brazil

                Categories
                Engineering, Technology and Techniques

                sodium borohydride (NaBH4),plant and mine tailings,mercury,hydride-generation,phytoextraction

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