N. Sato

On-line microextraction of metal traces for subsequent determination by plasma atomic emission spectrometry using pH peak focusing countercurrent chromatography.

M. Kanetomo, S. Kobayashi, Y. Ito, 1999, Analytical chemistry.

Separation of heavy metals by high-speed countercurrent chromatography

Yoshihiro Saito, Y. Ito, E. Kitazume, 1993 .

Mutual Metal Separation System with Enrichment Using pH‐Peak Focusing Countercurrent Chromatography

Y. Ito, E. Kitazume, T. Takatsuka, 2004 .