离子选择性电极法测定离子液体中的氟离子?  

Determination of Fluoride in Ionic Liquids by Ion Selective Electrode Method

作　　者：刘宝友[1] 李凤 LIU Bao-you;LI Feng(Pollution Prevention Biotechnology Laboratory of Hebei Province,School of Environmental Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学河北省污染防治生物技术重点实验室,河北石家庄050018

出　　处：《广州化学》2019年第1期41-46,共6页Guangzhou Chemistry

摘　　要：旨在探究是否可以利用离子选择性电极法对1-己基-3-甲基咪唑四氟硼酸盐(HmimBF4)离子液体复合材料中的氟离子进行测定。得到线性响应范围是pF值为0.5～5,最适pH值为6,其检出下限为1×10^(-5) mol/L,精密度为0.75%,测得离子液体的氟离子浓度为0.19 mol/L,加标回收率为97.2%～103.2%。结果表明,离子选择性电极法具有实际操作简单、响应时间短、加标回收率高、精密度高、准确度好等优点,所以可用于样品的测定。The purpose of this study is to explore whether fluorine ions in 1-hexyl-3-methylimidazolium tetrafluoroborate(HmimBF4)ionic liquid composite could be determined by fluorine ion-selective electrode analysis.The saturated calomel electrode was used as the reference electrode,and the fluoride ion electrode was used as the working electrode to quantitatively determine the fluoride ion in the ionic liquid,a linear response range is the pF value of 0.5~5,and it can be concluded from the experiment that the optimum pH is 6,the detection limit is 1×10-5 mol/L,the precision is 0.75%,and the spiked recoveries of the anions are between 97.2%~103.2%by measuring the ionic liquid with a fluoride ion concentration of 0.19 mol/L.The results show that the fluorine ion-selective electrode analysis has the advantages of simple operation,short response time,high recovery rate,high precision and good accuracy,so it can be used for the determination of samples.

关 键 词：电化学分析 离子液体 氟离子选择性电极法 

分 类 号：O657.7[理学—分析化学]