Full text
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| Author(s): |
Ana Paula Ruas de Souza
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Conjunto das Químicas (IQ e FCF) (CQ/DBDCQ) |
| Defense date: | 2010-09-15 |
| Examining board members: |
Mauro Bertotti;
Renato Sanches Freire;
Jairo José Pedrotti
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| Advisor: | Mauro Bertotti |
| Abstract | |
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. (AU) | |
| FAPESP's process: | 08/02384-2 - Biogeochemical cycles of cadmium and zinc in two estuarine systems of the State of São Paulo: emphasis on the determination of the phases of dissolved metals by voltammetry of redissolução anodic (stripping) |
| Grantee: | Ana Paula Ruas de Souza |
| Support Opportunities: | Scholarships in Brazil - Master |