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High performance centrifugal partition chromatographic separation of alkaline earth metal ions with bis-2-ethylhexylphosphinic acid

✍ Scribed by Yukio Nagaosa; Tao Wang

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
246 KB
Volume
26
Category
Article
ISSN
1615-9306

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✦ Synopsis

Abstract

The mutual separation of Ca(II), Mg(II), Sr(II), and Ba(II) was studied by high performance centrifugal partition chromatography using 0.16 M bis‐2‐ethylhexylphosphinic acid in heptane as a stationary phase. Two‐step elution of the four metal ions loaded was accomplished with aqueous chloroacetic acid mobile phases (pH 6.50 and 5.30). Ethanol (5%) was added to the pH 6.50 mobile phase for the separation of Sr(II) and Ba(II). The chromatographic conditions were 2,136 partition channels, 800 rpm rotational speed, and 1.5 cm^3^/min flow rate. The elution curve was obtained by monitoring the absorbance of each metal complex post‐labeled with a chromogenetic agent.

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Separation of some metal ions by high performance centrifugal partition chromatography with di-2-methylnonylphosphoric acid
✍ Yukio Nagaosa; Tao Wang 📂 Article 📅 2003 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 105 KB

## Abstract 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 mutu