Chromatographic investigation on the PS-DVB-based
stationary phase
The ion chromatographic evaluation was performed using a
test mixture of inorganic anions composed of fluoride, chloride,
nitrite, bromide, nitrate and sulfate. Inorganic anions were separated
with all synthesized stationary phases, which contained 3,
5 and 7 bonded layers, using a 15 mM hydroxide solution as the
mobile phase.
Representative chromatograms using the 3-, 5-, 7- and 9-layered
stationary phase are shown in Fig. 3. Under these conditions, the
stationary phase with nine bonded layers has too strong retention,