Study of mechanism retention of nonvolatile alkylphosphonic acids on unmodified selected polymer-based ion exchanger columns
The retention of alkylphosphonic acids (MPA, EPA, PPA, and BPA) and inorganic anions (Cl − , NO 3 − , and SO 4 2− ) 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 l...
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Veröffentlicht in: | Journal of analytical chemistry (New York, N.Y.) N.Y.), 2011-06, Vol.66 (6), p.586-590 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The retention of alkylphosphonic acids (MPA, EPA, PPA, and BPA) and inorganic anions (Cl
−
, NO
3
−
, and SO
4
2−
) 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. |
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ISSN: | 1061-9348 1608-3199 |
DOI: | 10.1134/S106193481106013X |