Additional evidence of the operational character of the lability of complexes of copper(II) with simple organic ligands

摘要: Abstract A fixed analytical window of observation, 5 μmol l −1 free copper and 100 total copper, but methods different in nature, operation mode time scale were applied, parallel, at pH 6.50 16 °C, to solutions with complexes very thermodynamic stabilities. Ethylenediaminetetraacetic acid (EDTA), -cysteine, -lysine, -proline succinate used as metal buffers. Chitin (batch column modes), chelex-100 (column mode) normal pulse anodic stripping voltammetry (NPASV, −0.3 V deposition potential) techniques. strategy, based on using the mass polymer that provided uptake similar taken up by Pseudomonas syringae bacterial cells absence ligands, was for all NPASV methods. Flame atomic absorption spectrophotometry detection. The lability simple organic ligands showed a strongly operational character. physicochemical method determination not only parameter inherent influenced extent complex dissociation. nature both initial competing may also condition speciation results.