离子色谱法同时测定氟化钠中微量氯离子和硫酸根离子  

Determination of Trace Chloridion and Sulfate Ion in Sodium Fluoride by Ion Chromatography

作　　者：闫春辉[1] 王梅[1] 陈木子[1] 金珍[1] 张勇 孙宏枚[2] 

机构地区：[1]苏州大学分析测试中心,江苏苏州215123 [2]苏州大学材料与化学化工学部,江苏苏州215123

出　　处：《化学分析计量》2016年第6期103-105,共3页Chemical Analysis And Meterage

摘　　要：建立抑制电导检测离子色谱法同时测定氟化钠中微量氯离子和硫酸根离子的方法.采用IonPac AS11–HC 阴离子交换分离柱,以氢氧化钾溶液为流动相.氯离子的质量浓度在0.1～0.4 mg/L 范围内与色谱峰面积线性良好,r=0.999 9 ;硫酸根离子的质量浓度在0.2～1.0 mg/L 范围内与色谱峰面积线性良好,r=0.999 6.氯离子、硫酸根离子测定结果的相对标准偏差分别为2.14%,1.22% （n=6）,加标回收率分别为98.0%,95.4%,检出限分别为0.011,0.014 mg/L.该方法选择性好,灵敏度高,可作为氟化钠中微量氯离子和硫酸根离子的质量控制方法.A method for the simultaneous determination of trace Cl^– and SO4^2– in sodium fluoride by ionchromatography with suppression conductivity detector was established. The separation was achieved on IonPac AS11–HCcolumn with KOH solution as the mobile phase. The concentration of Cl^– was linear with chromatographic peak area inthe range of 0.1–0.4 mg/L, r=0.999 9; The concentration of SO4^2– was linear with chromatographic peak area in the rangeof 0.2–1.0 mg/L, r=0.999 6. The mean recovery were 98.0% and 95.4%, the relative standard deviations were 2.14%and 1.22%, and detection limits were 0.011 mg/L and 0.014 mg/L for Cl– and SO4^2–, respectively. This method has goodlinearity and selectivity,it can be used as the quality control method for Cl^– and SO4^2– in sodium fluoride.

关 键 词：离子色谱法 氟化钠 氯离子 硫酸根离子 

分 类 号：O657.7[理学—分析化学]