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Cadmium Complexation in Culture Media
Author(s) -
Ceretti Helena M.,
Vullo Diana L.,
Zalts Anita,
Ramírez Silvana A.
Publication year - 2006
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.200503430
Subject(s) - cadmium , anodic stripping voltammetry , chemistry , titration , chelation , stability constants of complexes , ligand (biochemistry) , stripping (fiber) , inorganic chemistry , nuclear chemistry , biochemistry , materials science , ion , organic chemistry , electrochemistry , electrode , receptor , composite material
Square‐wave anodic stripping voltammetry (SW‐ASV) has been applied to monitor changes in the complexing capacity (CC) in a microbiological culture medium through different physiological states, focusing on cadmium interactions with the potential ligands. Total ligand concentration (Lt) is evaluated both from the titration curve and Ruzic linearization, with good agreement between the methods. Values obtained for the conditional stability constant suggest the occurrence of moderate ligands. Results show that the studied culture medium is capable of complexing cadmium and that the complexing capacity is affected by the physiological states of bacteria.