氧化银沉淀-离子色谱法测定盐酸基质溶液中微量硝酸根  

Using ion chromatography to determine nitrate in hydrochloric acid by removing chloride ion through adding silver oxide

作　　者：胡婧[1] 刘卫国[1,2] 

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075 [2]西安交通大学人居与环境学院,陕西西安710049

出　　处：《应用化工》2012年第12期2166-2167,2185,共3页Applied Chemical Industry

基　　金：黄土与第四纪地质国家重点实验室开放基金(Y15200B214);中科院地球环境研究所创新基金(Y151121214)

摘　　要：离子色谱测定盐酸基质溶液中微量硝酸根离子浓度时,高质量浓度的氯离子对硝酸根测定产生干扰。采用添加氧化银除去氯离子,并将盐酸中和至中性后,将水样加入离子色谱测定,以去除氯离子干扰。方法的相对标准偏差为0.05%～1.5%(n>3),盐酸溶液平均加标回收率为99.3%。Studied on the influence of chloride ion to nitrate determination when using ion chromatography to analyze low amount of nitrate in the hydrochloric acid solution. By adding the silver oxide, the chloride ion was removed and the pH of hydrochloric acid solution was adjusted to be neutral. Then the sample was injected in to the ion chromatography to determine the concentration of nitrate. The RSD of this method is 0.05% ～ 1.5% （n 〉3） ,and the average yield is 99.3%.

关 键 词：离子色谱法 NO3- HCl基质溶液 Cl-干扰消除 

分 类 号：O657.75[理学—分析化学]