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| Author(s): |
Paulo Roberto Vieira da Silva Júnior
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) |
| Defense date: | 2009-06-19 |
| Examining board members: |
Carlos Manoel Pedro Vaz;
Ivani Aparecida Carlos;
Sergio Antonio Spinola Machado
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| Advisor: | Carlos Manoel Pedro Vaz |
| Abstract | |
In this work a methodology for determination of metallic ions (micronutrients and contaminants), macronutrients and pesticides in soil and natural waters was developed using an Hg plated iridium based ultramicroelectrode and voltammetric techniques, using a ceramic capsule as an electrochemical cell. The measurement procedures were developed initially in controlled conditions and therefore applied to in-situ measurements, in soil and natural waters, performed in lab and with real field samples. Regarding the obtained results it was possible do explore the voltammetric techniques, mainly the pulsed and stripping ones, as tools for in-situ determination of Cd(II), Pb(II), Cu(II) and the insecticide methyl parathion, with good reproducibility and sensibility, with detection limits in the order of hundreds of parts per billion. (AU) | |