2007
DOI: 10.1002/elan.200603687
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Verification of Applicability of Mercury Meniscus Modified Silver Solid Amalgam Electrode for Determination of Heavy Metals in Plant Matrices

Abstract: The study is focused on the silver solid amalgam electrode modified by mercury meniscus (m-AgSAE). After its successful application for determination of heavy metals by differential pulse anodic stripping voltammetry (DPASV) in aqueous solutions, its use in more complicated matrices has followed. Four different reference materials of plant origin were used -White Cabbage, Rye Grass, Aubergine and Lucerne, and the obtained results of Cd, Cu and Pb contents were compared both with (certified) reference values an… Show more

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Cited by 34 publications
(5 citation statements)
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References 16 publications
(10 reference statements)
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“…The paired two-sample t-test for equal means was calculated as in ref. 39 . All statistical data were calculated for the level of significance α = 0.05.…”
Section: Methodsmentioning
confidence: 95%
“…The paired two-sample t-test for equal means was calculated as in ref. 39 . All statistical data were calculated for the level of significance α = 0.05.…”
Section: Methodsmentioning
confidence: 95%
“…A extremidade desta cavidade é imersa em um recipiente contendo mercúrio líquido e deixada em repouso por um determinado tempo, durante o qual o mercúrio penetra entre as partículas metálicas formando uma fase sólida e compacta. 40 O tempo necessário para a completa amalgamação depende do metal empregado, podendo levar alguns minutos, quando a prata é empregada e, alguns meses, quando o metal é o cobre.…”
Section: Amalgamação Naturalunclassified
“…Além disto, a superfície sólida e compacta obtida pode ser empregada para a modificação com um filme de mercúrio depositado eletroquimicamente, ou com um menisco de mercúrio formado pelo simples contato do SAE com o mercúrio líquido. [36][37][38][39][40] A amalgamação natural é o procedimento preferível para a construção de eletrodos sólidos de amálgama de cobre (CuSAE), pois minimiza a formação de óxidos, que podem promover uma passivação da amálgama formada, prejudicando a sensibilidade analítica e a reprodutibilidade nas medidas voltamétricas.…”
Section: Amalgamação Naturalunclassified
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“…High hydrogen overvoltage on these materials allows to work in aqueous solutions up to −2000 mV 6, 7. Construction of nontoxic solid amalgam electrodes 6, 810 and paste amalgam electrodes 7, 11, 12 is not different from electrodes of other materials suitable for FA. The very useful advantage of solid amalgams is the possibility to prepare electrodes of required size and shape.…”
Section: Introductionmentioning
confidence: 99%