摘要
目的：建立积分安培检测-离子色谱法测定水和废水中碘化物的方法.方法：采用IonPac AS11型阴离子分离柱,以40 mmol/L NaOH为淋洗液,银工作电极,积分安培检测离子色谱法.结果：碘离子的保留时间少于4 min,与其它离子交换柱相比,IonPac AS11阴离子交换柱有较强的亲水性,分离疏水性的碘离子,可有效地改善碘离子的峰形.碘离子的线性良好（r＞0.9990）,相对标准偏差小于2.5%（n=7）,平均加标回收率均在92.4%～99.9%之间,检出限为0.27 μg/L.结论：方法灵敏、快速.
Objective：Toestablish a ion - chromatography method to measure iodide in water and waste water by integrated amperometric detection on a silver working electrode. Methods： Iodide was separated on the IonPac AS11 column using a 40 mmol/L sodium hydroxide solution. Iodide was detected using an integrated amperometric detector with a silver working electrode. Results： Iodide elutes in less than 4 min and was well separated from the void volume. Compared to other ion - exchange columns,the IonPac AS1 l contained a very hydrophilic pellicular resin that improves the peak shape of the hydrophobic iodide ion. The linearity and reproducibility of iodide detetion by integrated amperometry was good （ r 〉 0. 9990）. The peak area RSD of this analysis was 〈 2. 5% （n = 7 ） , and the recovery rate was 92. 4% -99.9%. The detection limit of iodide using integrated amperometric detection was 0. 27 μg/L Conclusion：This method is specific, sensitive and rapid.
出处
《中国卫生检验杂志》
CAS
2007年第8期1431-1432,共2页
Chinese Journal of Health Laboratory Technology
关键词
碘化物
积分安培
离子色谱法
Iodide
Integrated amperometry
Ion chromatography
