Study of mechanism retention of nonvolatile alkylphosphonic acids on unmodified selected polymer-based ion exchanger columns

Author： Haddad Mohammadine Boulahjar Rajâa Slimani Rachid Viaud-Massuard Marie-Claude Antri Saïd Lazar Saïd

Publisher： MAIK Nauka/Interperiodica

ISSN： 1061-9348

Source： Journal of Analytical Chemistry, Vol.66, Iss.6, 2011-06, pp. : 586-590

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Abstract

The retention of alkylphosphonic acids (MPA, EPA, PPA, and BPA) and inorganic anions (Cl⁻, NO ₃⁻ , and SO ₄²⁻ ) were studied on two anion exchangers, e.g., Dionex IonPac AS4A-SC (250 ± 4 mm I.D.) and Satisfaction P 4000-SAX (50 ± 4.6 mm I.D.) under isocratic elution conditions with evaporative light scattering detector. The plots of retention factors, k, of organic anions vs. the reciprocal of eluent ion concentration show good linearity. The major retention mechanisms are interpreted as ion exchange and some others interactions. The C effect of organic modifier added to the aqueous buffered mobile phase is also investigated.