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A polarographic investigation on interactions between cu(ii) ions and natural degradation products of a herbicide atrazine
Author(s) -
Grabec Irena,
Ogorevc Božidar,
Hudnik Vida
Publication year - 1994
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.1140061017
Subject(s) - polarography , chemistry , atrazine , titration , ligand (biochemistry) , stability constants of complexes , ion , inorganic chemistry , aqueous solution , metal ions in aqueous solution , pesticide , organic chemistry , biochemistry , receptor , agronomy , biology
A study was performed to investigate the possible formation of coordination compounds between Cu(II), Cd(II), Zn(II), and Pb(II) ions and natural degradation products of atrazine (ATR) desisopropylatrazine (DIA), desethylatrazine (DEA), and desethyldesisopropylatrazine (DEIA), as well as parent compound ATR itself and the related s‐triazine herbicide prometryne (PRO). By using polarographic and voltammetric titrations of a metal ion with a ligand and vice versa, at mercury drop or plain carbon paste electrode, only a formation of coordination compounds involving Cu(II) ions, of a type CuL 2 (L = DEA, DIA, and PRO) and CuL (L = DEIA) in aqueous solutions at pHs above 4, were observed. By applying an indirect polarographic method with ligand exchange (EDTA), a conditional stability constant of CuDEIA was determined, and the value β CcuDEIA = 12.7 was obtainted.