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Voltammetric Determination of Herbicide Triasulfuron using Mercury Meniscus Modified Silver Solid Amalgam Electrode
Bandžuchová, L. ; Šelešovská, R. ; Chýlková, J. ; Navrátil, Tomáš
Voltammetric behavior of triasulfuron (TS), which belongs to sulfonylurea herbicide family, was studied using two working electrodes: mercury meniscus modified silver solid amalgam electrode (m-AgSAE) and hanging mercury drop electrode (HMDE) for comparison. It was found that TS provided one reduction peak on both used working electrodes. The highest response was observed in the environment of Britton-Robinson buffer (BR) of pH 3 (m-AgSAE) and 2.5 (HMDE), respectively. Working parameters of differential-pulse voltammetry (DPV) were optimized and this method was applied in analysis of agricultural formula and river water.
Direct Voltammetric Determination of Antioxidant Butylated Hydroxyanisol in Biodiesel
Tomášková, M. ; Chýlková, J. ; Jehlička, V. ; Navrátil, Tomáš ; Šelešovská, R.
Direct voltammetric determination of antioxidant butylated hydroxyanisol (BHA) in isopropanol containing 0.1 mol L-1 H2SO4 using linear sweep voltammetry with gold working electrode was tested. The developed method was purposed for determination of BHA in biodiesel. There were compared the results achieved by nonlinear and linear regression of registered data. This method was applied by analysis of biodiesel samples. These analyses can be performed directly, without necessity of sample treatment or extraction.

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