Original Uses of the Liquid Nature of the Stationary Phase in CCC. I. Extraction and Separation of Transition Metal Ions

Countercurrent Chromatography in Analytical Chemistry (IUPAC Technical Report)

“…This way of using a CCC instrument was described for the separation of transition-metal ions. Co II , Ni II , Cu II , and Zn II were separated using B2EHP in heptane as the stationary phase through a reversed micelle extraction process [132]. The displacement process and collection of the stationary heptane phase allowed the recovery of ion bands with purity higher than 95 %.…”

On-Line Microextraction of Metal Traces for Subsequent Determination by Plasma Atomic Emission Spectrometry Using pH Peak Focusing Countercurrent Chromatography

“…Separation followed by enrichment based on displacement chromatography was studied by Talabardon et al, and a 10-fold concentration of transition metal ions was observed in the stationary phase. 12 Diffusion is inherent to chromatographic separation, with sample band spreading in the column unavoidable in HSCCC as in conventional liquid chromatography. pH peak focusing countercurrent chromatography (pH-PFCCC) is a unique technique based on neutralization between mobile and stationary phases.…”

“…Additional band spreading occurred in the flow tube when the concentrated solution was eluted with an acid solution for subsequent analysis. Separation followed by enrichment based on displacement chromatography was studied by Talabardon et al, and a 10-fold concentration of transition metal ions was observed in the stationary phase . Diffusion is inherent to chromatographic separation, with sample band spreading in the column unavoidable in HSCCC as in conventional liquid chromatography.…”