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Polarographic and Voltammetric Determination of Fomesafen
 Maška, Jan ; Barek, Jiří (advisor) ; Fischer, Jan (referee)
The work is related to the polarographic and voltammetric determination of Fomesafen on the basis of its cathodic reduction using classical dropping mercury electrode (DME), hanging mercury drop electrode (HMDE) and non-traditional mercury meniscus modified silver solid amalgam electrode (m-AgSAE). Silver solid electrode (AgSAE) was developed as an alternative to mercury electrodes regarding legislative complications limitating usage of mercury because of its supposed toxicity. Properties of this electrode are very similar to the ones of mercury electrodes, mainly outstandingly broad cathodic potential region but excelent sensitivity either. As an electrode material, silver amalgam was used which non-toxicity is obvious given for example even by its long-term usage in stomatology as a main item for production of tooth-fillings. For model determination, Fomesafen was chosen because of its previous and sometimes also present usage as a major component of herbicid agents in agriculture. Its factual toxicity was actually proven and it was also classified as a potential carcinogen for humans. Historically, its usage was relatively deliberately massive, significant was e.g. in USA, but presently it was already forbidden in many countries. The intention of the work was to compare the analytical qualities...
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