Jz. Gao et al., SIMULTANEOUS DETERMINATION OF INORGANIC ANIONS AND CATIONS BY ION CHROMATOGRAPHY WITH INDIRECT PHOTOMETRIC DETECTION, Journal of chromatography, 657(1), 1993, pp. 95-101
Inorganic cations and anions were separated simultaneously on a silica
-based Shim-pack WAX-1 column. The method is shown to provide efficien
t separation of Ca2+, Mg2+, Cl- and NO3-. Using 1 mM phthalate-6 mM ED
TA at pH 6.57 as the eluent, a mixture containing these ions was separ
ated in less than 6 min with detection limits of 1.2-2 ng. The effects
of the eluent pH, concentration and composition on the retention beha
viour of the analytes were studied. Two practical applications are des
cribed.