关键词: 离子色谱, 亚氯酸钠, 溴离子, 硫酸盐, 硝酸盐

Abstract: An accurate and rapid determination method of bromide，nitrate and sulfate three ions in industrial sodium chlorite was established by ion chromatography.The ion chromatograph of ICS-1500 which including IonPac AS12A column，carbon- ate eluent system-sodium carbonate（2.7 mmol/L）+sodium bicarbonate（0.3 mmol/L），and the conductivity detector was adopted.The influences of concentration ratio of mobile phase，velocity of flow，and sample injected on the separation effect were also investigated.The chromatographic conditions were optimized and the simultaneous determination and baseline separation of impurity ions were realized.It is accurate and rapid for this method，which could greatly shorten the time of analysis，thereby it has significant advantages compared with the standard method of HG/T 3250—2010.

Key words: ion chromatography, sodium chlorite, bromide ion, sulfate, nitrate