A microbore anion column, using carbonate system eluent ,it can simultaneously analyze 7 kinds of common anions (F–, Cl–, Br–, NO2–, NO3–, PO43-, SO42-), disinfection by-products (BrO3– ,ClO2– ,ClO3– ,DCA, TCA) and other anions. With fine diameter, low flow rate, high signal response value, It is suitable for trace analysis of natural mineral drinking water, packaged drinking water and domestic drinking water.