After ultrasonic extraction and centrifuge separation and precipitation, iron ore samples were filtered by IC-RP column, IC-Na column and 0.22 um microporous filtration membrane respectively. Using CIC-D120 ion chromatograph, SH-AC-3 anion column, 3.6 mM Na₂CO₃+4.5 mM NaHCO₃  eluent and  bipolar pulse conductance method,under the recommended chromatographic conditions,the chromatogram is as follows.

    The detection limits of F^- and Cl^-  are 2.1 ug/g and 3.5 ug/g. The recoveries of F^- and Cl^-  are 96%-104%. It can be used for the analysis of natural iron ore, iron ore concentrate and other samples.