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The retention of alkylphosphonic acids (MPA, EPA, PPA, and BPA) and inorganic anions (Cl, NO, and SO) 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. [ABSTRACT FROM AUTHOR]

The drift tube temperature of an evaporative light-scattering detector for inorganic anions and cations response has been evaluated. The results of the detector are independent of temperature in the range studied (40-80°C) for cations, sulfate, and phosphate, but the responses for chloride and nitrate decrease when tube temperature increases. We also studied the effect of nebulizing gas temperature on the response of the evaporative light-scattering detector and noted a 200% improvement of the intensity of the signal. [ABSTRACT FROM AUTHOR]