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Separation of some metal ions by high performance centrifugal partition chromatography with di‐2‐methylnonylphosphoric acid
Author(s) -
Nagaosa Yukio,
Wang Tao
Publication year - 2004
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.861
Subject(s) - chemistry , elution , metal ions in aqueous solution , chromatography , metal , absorbance , partition coefficient , chloroacetic acid , inorganic chemistry , analytical chemistry (journal) , nuclear chemistry , organic chemistry
The separation of such metal ions as Cu(II), Mn(II), Co(II), Ni(II), Mg(II) and Ca(II) has been investigated by high performance centrifugal partition chromatography (HPCPC) employing di‐2‐methylnonylphosphoric acid/heptane as a stationary phase. The four transition metal ions have mutually been separated by the two‐step elution method, changing the pH of the chloroacetic acid mobile phase, and the two alkaline earth metal ions have been separated by an isocratic elution. The HPCPC system was operated with 2136 partition channels, at a rotation speed of 800 rpm, and at a flow rate of 2.0 cm 3 min −1 . The elution curve was obtained by monitoring the absorbance of each metal complex post‐labeled with chromogenic compounds. Copyright © 2003 Society of Chemical Industry