@article{oai:nitech.repo.nii.ac.jp:00005396,
 author = {Yasui, Takashi and Kashihara, Yuki and Miyake, Fumiko and Sugitani, Seiko and Yamada, Hiromichi and Yuchi, Akio},
 issue = {8},
 journal = {Analytical sciences : the international journal of the Japan Society for Analytical Chemistry},
 month = {Aug},
 note = {The interactions between Cu(II) complexes with heterocyclic azo compounds and several anions were studied by equilibrium analysis of ion-pair extraction, RP-HPLC of metal complexes, and ion chromatography of anions on an ODS column coated with Cu(II) complexes of the long alkyl derivatives. Both ion-pair extraction and HPLC studies demonstrated that a dicationic complex with 8-(3,5-dibromo-2-pyridylazo)-5-aminoquinoline interacted with anions stronger than a monocationic complex with 2-(2-pyridylazo)methylphenol. Anions were more retained on the column coated with dicationic Cu(II) complex. Such differences were quantitatively ascribed to the first ion-pair formation of the dicationic complex giving a monocationic species., application/pdf},
 pages = {993--997},
 title = {Liquid-Liquid Extraction and Liquid Chromatographic Studies on Interactions of Inorganic Anions with Coordinatively Unsaturated Copper(II) Complexes of Heterocyclic Azo Compounds},
 volume = {24},
 year = {2008}
}