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National Repository of Grey Literature 4 records found  Search took 0.01 seconds. 
Voltammetric determination of pesticide Amitraz on hanging mercury drop electrode and silver solid amalgam electrode
 Harvila, Marek ; Zima, Jiří (advisor) ; Schwarzová, Karolina (referee)
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Varroóza a možnosti jejího tlumení organickými kyselinami
 Moravová, Pavlína
The diploma thesis was focused on the possibility to control Varroa destructor in honeybees by using natural varroacides. In the literary section were processed findings about drugs and in the practical part there were described and evaluated the results. During the experiment the effectiveness of formic acid and fluvalinate and effectiveness of oxalic acid and amitraz were compared. Statistical evaluation of results has found that formic acid reached 78,6% efficiency, and oxalic acid on average, 93,8% efficiency, and this efficiency was equal or statistically insignificantly slightly higher compared to synthetic alternatives. Any negative effects of organic acids on the status and development of colonies were observed. Experiment results are particularly important for the treatment of resistant populations of mites and prevent cumulative acaricides residues in bee products.
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Voltammetric determination of pesticide Amitraz on hanging mercury drop electrode and silver solid amalgam electrode
 Harvila, Marek ; Zima, Jiří (advisor) ; Schwarzová, Karolina (referee)
Detailed record
Use of Silver Solid Amalgam Electrode for Determination of Acaricide Amitraz
 Nováková, Kateřina ; Harvila, M. ; Navrátil, Tomáš ; Zima, J.
The electrochemical behavior of amitraz was studied at polished (p-AgSAE) and mercury meniscus modified (m-AgSAE) silver solid amalgam electrodes. The reaction mechanism was investigated using direct current voltammetry (DCV) and elimination voltammetry with linear scan (EVLS). The optimum conditions for differential pulse adsorption stripping voltammetry (DPAdSV) determination of amitraz were found in Britton-Robinson (BR) buffer mixed with ethanol in a volume ration of 1:4. DPAdSV with optimized parameters was applied for determination of amitraz in analyzed solutions. The limits of detection were calculated as 8.9 nmol L-1 (tacc = 20 s) for m-AgSAE and 0.168 mol L-1 (tacc = 20 s) for p-AgSAE. The proposed method was successfully applied for determination of this compound in real sample solutions.
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