Adsorption of methionine on the mercury electrode from 0.5 to 8 mol dm−3 chlorates(VII) was examined. In all the systems studied the relative surface excesses of methionine increase with the increase of electrode charge and adsorbate concentration, they depend also on chlorates(VII) concentration. The adsorption parameters were determined from the Frumkin and virial isotherms. It was stated that the adsorption parameters change together with the change of supporting electrolyte concentration, what points at competitive adsorption of methionine and ClO₄⁻ ions and electrostatic interactions between the water dipoles and methionine in the double layer.
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Nosal‐Wiercińska et al. (2010) studied this question.
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