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Electrostatic ion chromatography of cations using an N-dodecylphosphocholine zwitterionic stationary phase and water as the mobile phase

journal contribution
posted on 2023-05-16, 11:39 authored by Hu, W, Paul HaddadPaul Haddad, Hasebe, K, Tanaka, K
The separation of inorganic cations using a phosphocholine-type zwitterionic stationary phase [formed by coating an octadecyl silica column with a phosphocholine zwitterionic surfactant (PC-ZS)] and water as the mobile phase has been investigated. The PC-ZS possesses a positively charged group (+) and a negatively charged group (–), with the (+) being outermost and the (–) being innermost. In other words, the positions of the functional groups are opposite to that for sulfobetaine-type zwitterionic surfactants (SB-ZS) used previously for the separation of inorganic anions. With a PC-ZS stationary phase, cations having the same charges (e.g., Mg2+, Ca2+, Ba2+) were separated successfully. This study shows that the separation selectivity of zwitterionic stationary phases towards inorganic anions or cations is determined chiefly by the positions of the two charged groups on the zwitterion. The elution order for the cations (for example Ba2+

History

Publication title

Analytical Communications

Volume

36

Pagination

97-100

ISSN

1359-7337

Department/School

School of Natural Sciences

Publisher

Royal Society of Chemistry

Place of publication

UK

Rights statement

Copyright © 1999 Royal Society of Chemistry

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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