The selective extraction of heavy metal cations by Lewatit® TP 207 is also achieved in presence of complexing agents such as nitrogen compounds (e.g. ammonia, aliphatic and aromatic amines), multivalent carboxylic acids (e.g. citric, gluconic, tartraric, oxalic acid) and phosphates (e.g. sodium polyphosphate, tetrasodium diphosphate).
