An anion column with high efficiency,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– ,dichloroacetic acid DCA, trichloroacetic acid TCA) and other anions . With good peak shape, gradient elution, higher sensitivity and wider application scope, it is suitable for drinking natural mineral water, packaging drinking water, drinking water and other industries.