Yuhui A-SMQ-E is a premium grade macroporous strong base anion (SBA) exchange resin based on styrene-divinylbenzene (DVB) copolymers with quaternary amine (Triethylamine) functional group and standard Gaussian particle size distribution. Due to its special functional group, A-SMQ-E has strong selectivity to capture nitrate and nitrite even though in presence of other anions such as sulfate, chloride and bicarbonate. A-SMQ-E is developed to be used for nitrate and nitrite removal from contaminated water. A-SMQ-E can be regenerated with brine solution.