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Ion-exchange separations on mixed columns

✍ Scribed by Takeo Yamabe

Book ID
104145012
Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
434 KB
Volume
83
Category
Article
ISSN
1873-3778

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✦ Synopsis

The separation of metal ions by elution with a solution containing a chelateforming agent, namely an organic hydroxy acid (lactic acid or tartaric acid) was investigated by changing the mixing ratio (y) of the cation-and anion-exchange resins and by changing the pH of the eluent. When the concentration of lactic acid was 0.5 Mat pH 2.8 and y = 1/2, a mixed sample of Lu, Tm, Er, Ho, Dy, Tb and Gd was completely separated within 100 min. When the concentration of tartaric acid was 0.25 Mat pH 3.0 and y = 2, a mixed sample of Cu, Zn, Pb, Co and Cd was completely separated within 90 min.

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## Abstract Fused silica columns of 4.6 ΞΌm i.d. were coated with 3‐sulfopropylsilane as a cation exchanger and 3‐(2‐aminoethyl‐amino)‐propylsilane as an anion exchanger. Fast separations of cations (< 25 seconds) and of anions (< 35 seconds) were obtained, using a potentiometric microelectrode as a