关键词:
Copper
Herbicide glyphosate
Glycine
Linear sweep voltammogram
Anodic current peak
Electroanalysis
摘要:
Anodic dissolution of metal (copper) in ligand solutions was considered in the framework of the model, taking into account the features of mass transfer of chemically interacting species. It follows from the theory that the necessary and sufficient condition for the appearance of current peaks on linear sweep (LS) voltammograms is the requirement to form sufficiently stable and labile complexes containing the electrogenerated ions and ligand. To verify the theoretical conclusions, an experimental study of Cu vertical bar Cu(II), glycine system was carried out. In accordance with theory, the height of LS peaks can be used as a measure of only that amount of analyte, which is in the form of free ligand. The potential application of electrogenerated Cu2+ ions for analysis of herbicides (glyphosate) in the environment and the sources of errors were discussed. (C) 2020 Elsevier B.V. All rights reserved.