Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV

Square wave anodic stripping voltammetry (SWASV) was applied to the simultaneous determination of trace amounts of toxic metals Pb(II), Cd(II) and Cu(II) in white poplar (populus) leaves, used as bio indicator and gathered in a chosen area of the city of Lisbon with very high traffic intensity. The leaves were dried and subsequently exposed to an acid digestion microwave process. Square wave parameters were optimized for the voltammetric analysis of the samples. The working electrode consisted of a thin mercury film (TMFE) deposited on the surface of vitreous carbon. The pair Ag/AgCl was used as the reference electrode and a Pt wire as the auxiliary electrode. Average concentrations (in mg of metal/kg of dry matter-leaves) of 2.6, 0.18, and 5.0 were obtained for Pb(II), Cd(II) and Cu(II), respectively. The value for lead coincides with the one obtained by the reference method based on Graphite Furnace Atomic Absorption Spectrophotometry (GFAAS).

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Main Authors: Silva,Nelson A. F., Lopes,Maria I., Leitão,Ruben A. E., Silva,Hugo F. A., Matos,Manuel J.
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Química 2005
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700028
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spelling oai:scielo:S0103-505320050007000282006-01-04Simultaneous monitoring of toxic metals on white poplar (populus) by SWASVSilva,Nelson A. F.Lopes,Maria I.Leitão,Ruben A. E.Silva,Hugo F. A.Matos,Manuel J. SWASV environmental samples toxic metals microwave digestion bio indicator Square wave anodic stripping voltammetry (SWASV) was applied to the simultaneous determination of trace amounts of toxic metals Pb(II), Cd(II) and Cu(II) in white poplar (populus) leaves, used as bio indicator and gathered in a chosen area of the city of Lisbon with very high traffic intensity. The leaves were dried and subsequently exposed to an acid digestion microwave process. Square wave parameters were optimized for the voltammetric analysis of the samples. The working electrode consisted of a thin mercury film (TMFE) deposited on the surface of vitreous carbon. The pair Ag/AgCl was used as the reference electrode and a Pt wire as the auxiliary electrode. Average concentrations (in mg of metal/kg of dry matter-leaves) of 2.6, 0.18, and 5.0 were obtained for Pb(II), Cd(II) and Cu(II), respectively. The value for lead coincides with the one obtained by the reference method based on Graphite Furnace Atomic Absorption Spectrophotometry (GFAAS).info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.16 n.6a 20052005-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700028en10.1590/S0103-50532005000700028
institution SCIELO
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country Brasil
countrycode BR
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libraryname SciELO
language English
format Digital
author Silva,Nelson A. F.
Lopes,Maria I.
Leitão,Ruben A. E.
Silva,Hugo F. A.
Matos,Manuel J.
spellingShingle Silva,Nelson A. F.
Lopes,Maria I.
Leitão,Ruben A. E.
Silva,Hugo F. A.
Matos,Manuel J.
Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
author_facet Silva,Nelson A. F.
Lopes,Maria I.
Leitão,Ruben A. E.
Silva,Hugo F. A.
Matos,Manuel J.
author_sort Silva,Nelson A. F.
title Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
title_short Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
title_full Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
title_fullStr Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
title_full_unstemmed Simultaneous monitoring of toxic metals on white poplar (populus) by SWASV
title_sort simultaneous monitoring of toxic metals on white poplar (populus) by swasv
description Square wave anodic stripping voltammetry (SWASV) was applied to the simultaneous determination of trace amounts of toxic metals Pb(II), Cd(II) and Cu(II) in white poplar (populus) leaves, used as bio indicator and gathered in a chosen area of the city of Lisbon with very high traffic intensity. The leaves were dried and subsequently exposed to an acid digestion microwave process. Square wave parameters were optimized for the voltammetric analysis of the samples. The working electrode consisted of a thin mercury film (TMFE) deposited on the surface of vitreous carbon. The pair Ag/AgCl was used as the reference electrode and a Pt wire as the auxiliary electrode. Average concentrations (in mg of metal/kg of dry matter-leaves) of 2.6, 0.18, and 5.0 were obtained for Pb(II), Cd(II) and Cu(II), respectively. The value for lead coincides with the one obtained by the reference method based on Graphite Furnace Atomic Absorption Spectrophotometry (GFAAS).
publisher Sociedade Brasileira de Química
publishDate 2005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000700028
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