摘要
针对离子色谱仪测定饮用水中亚氯酸盐的实际操作中遇到的一些问题,对方法前处理中是否需要通入氮气、是否需要加入乙二胺、何时需要通氮气、是否需要当天测定等方面作了探讨。结果表明,测定亚氯酸盐时,水样静止不吹的亚氯酸盐测定值要比氮吹和空气吹后的值可能高50%以上,必须在取样后氮吹10 min;水样加和不加乙二胺后的测定值变化不大;水样在氮吹10 min后,若当天无法测定,可以在第二天测定。必须在取样后立即氮吹,隔1 h氮吹后亚氯酸盐的测定值增加约20%。
Based on some problems encountered in the actual operation of chlorite determination with ion chromatog- raphy, when and whether needed to access nitrogen and whether needed to add ethylenediamine and carried out the determination at the day during the pretreatment were discussed. The results showed that for determination of chlorite, water still blowing chlorite determination value than nitrogen blowing and blowing the air after the value may be as high as 50% above, and must be sampled after nitrogen blowing 10 rain. water with ethylenediamine after the determination value changes little; If the water after nitrogen blowing for 10 rain and can not be determined at the day, it can be determined the next day. It must be immediately got nitrogen blowing after the sample taking away, the determination value of chlorite increased about 20% after nitrogen blowing for 1 h.
出处
《广州化工》
CAS
2013年第1期116-117,126,共3页
GuangZhou Chemical Industry
关键词
离子色谱法
饮用水
亚氯酸盐
ion chromatography
drinking water
chlorite
