Voltammetric Determination of Herbicide Biphenox on Mercury-Meniscus-Modified Solid Silver Amalgam Electrode

Page: 236

D. Cabalkováa, J. Bareka, J. Fischera, T. Navrátilb, K. Peckováa, and B. Yosypchukb

a Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Charles University, Prague, b J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Prague


Optimum conditions are described for the determination of micromolar and submicromolar concentrations of herbicide Biphenox by differential pulse voltammetry (DPV) on non-toxic solid silver amalgam electrode modified with mercury meniscus in aqueous methanol¬ic (9:1) Britton-Robinson buffer (pH 7). The limit of quantification is 2.4?10????????????7 mol l????????????1. Cyclic voltammetry with the same working electrode was used to clarify the mechanism of the electrode reaction.


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