A microbore anion column, using hydroxide 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,gradient elution, it is suitable for trace analysis of power plant water, natural mineral drinking water, packaged drinking water and domestic drinking water.