• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.46.2010.tde-10112010-112208
Document
Author
Full name
Ana Paula Ruas de Souza
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Bertotti, Mauro (President)
Freire, Renato Sanches
Pedrotti, Jairo José
Title in Portuguese
Determinação de íons cádmio e zinco no sistema estuarino - lagunar de Cananéia - Iguape por voltametria de redissolução anódica
Keywords in Portuguese
Água estuarina
Cádmio
Chumbo
Microeletrodo
Stripping
Voltametria
Zinco
Abstract in Portuguese
A determinação dos íons Cd(II) e Zn(II) foi realizada em amostras de águas estuarinas por voltametria de redissolução anódica utilizando microeletrodo de fibra de carbono (raio =3 µm). O filme de bismuto foi depositado in situ, simultaneamente com os analitos em microeletrodo sob as condições otimizadas. O intervalo linear da curva de calibração para ambos os íons metálicos foi 0,5 -10,0 nmol L-1 e os limites de detecção de Cd(II) e Zn(II) foram estimados em 17 e 52 pmol L-1, respectivamente. A precisão dos resultados fornecidos empregando-se o microeletrodo de filme de bismuto (BiFME) foi avaliada pela realização de experimento com uma amostra certificada e teste de recuperação. A utilidade da metodologia foi demonstrada aplicando o BiFME para determinar baixas concentrações de Cd(II) e de Zn(II) em água do estuário.
Title in English
Determination of cadmium and zinc ions in the Lagoon - Estuarine System Cananéia - Iguape by anodic stripping voltammetry
Keywords in English
Cadmium
Estuarine water
Lead
Microelectrode
Stripping
Voltammetry
Zinc
Abstract in English
A bismuth-film electrode for use in anodic stripping voltammetry was employed in order to quantify Cd(II) and Zn(II) in estuarine water samples. The bismuth film was deposited in situ simultaneously with the analytes onto a carbon fiber disc microelectrode (radius = 3 µm). Under the optimised conditions, calibration plots for both metallic ions were obtained in the range 0.5 to 10.0 nmol L-1 and the limits of detection for Cd(II) and Zn(II) were estimated as 17 and 52 pmol L-1, respectively. The accuracy of the results supplied by the bismuth film microelectrode (BiFME) was assessed by performing experiment with a certified sample and addition-recovery experiments. The usefulness of the methodology was demonstrated by applying the BiFME to measuring the Cd(II) and Zn(II) content in estuarine water.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
errataAnaPaulaRuas.pdf (170.12 Kbytes)
Publishing Date
2011-01-20
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.