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Adsorption of Methonine at Mercury/Aqueous Solution of Chlorate(VII) Interface; Dependence on the Supporting Electrolyte Concentration
Author(s) -
NosalWiercińska Agnieszka,
Dalmata Grażyna
Publication year - 2010
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201000069
Subject(s) - adsorption , chlorate , chemistry , electrolyte , mercury (programming language) , inorganic chemistry , aqueous solution , dropping mercury electrode , supporting electrolyte , ion , electrode , electrochemistry , organic chemistry , computer science , programming language
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 ClO $\rm{{_{4}^{-}}}$ ions and electrostatic interactions between the water dipoles and methionine in the double layer.