色谱

色谱

• 研究论文 • 上一篇    下一篇

离子色谱法同时测定离子液体中六氟磷酸根及痕量杂阴离子

胡忠阳*, 潘广文, 叶明立   

  1. Shanghai Laboratory of Application and Research Center, Dionex China Limited, Shanghai 201203, China
  • 收稿日期:2008-09-28 修回日期:2008-11-28 出版日期:2009-05-30 发布日期:1982-09-25
  • 通讯作者: 胡忠阳

Simultaneous determination of hexafluorophosphate and other trace impurity anions in ionic liquids by ion chromatography

HU Zhongyang*, PAN Guangwen, YE Mingli   

  1. Shanghai Laboratory of Application and Research Center, Dionex China Limited, Shanghai 201203, China
  • Received:2008-09-28 Revised:2008-11-28 Online:2009-05-30 Published:1982-09-25
  • Contact: HU Zhongyang

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844

被引次数

41

摘要： 建立了一种同时测定离子液体中六氟磷酸根(PF~6)和痕量杂阴离子氟、氯、溴(F~,Cl~,Br~)的离子色谱方法(IC)。样品经溶解、稀释、过滤后用Dionex IonPac AS22分离柱(250 mm×4 mm)分离,淋洗液为碳酸盐-乙腈体系(体积比为70:30),流速1.0 mL/min,采用Dionex DS6电导检测器检测,外标法定量。F~,Cl~,Br~和PF~6的线性范围分别为0.5～50 μg/L、10～200 μg/L、10～200 μg/L和0.9～45 mg/L,线性相关系数分别为0.9999,0.9998,0.9999和0.9998,加标回收率为94.5%～100.5%,相对标准偏差为0.63%～1.03%,检出限(以信噪比为3计)分别为0.5 μg/L、2.0 μg/L、5.0 μg/L和0.9 mg/L。该方法用于离子液体中六氟磷酸根和痕量杂阴离子的同时测定,结果令人满意。

关键词: 离子色谱, 离子液体 , 六氟磷酸根, 阴离子

Abstract: A method was developed for the simultaneous determination of hexafluorophosphate and other trace impurity anions in ionic liquids by ion chromatography (IC). The sample was diluted with 70% (v/v) acetonitrile, filtrated by 0.22 μm nylon filter membrane, and then analyzed by IC. The analytical column was Dionex IonPac AS22 (250 mm×4 mm), carbonate-acetonitrile (70:30, v/v) was used as the eluent at a flow rate of 1.0 mL/min. The detection was performed by a Dionex DS6 conductivity detector. The quantitive analysis of external standard calibration curves was used. The linear ranges of the method for F~, Cl~, Br~ and PF~6 were 0.5~50 μg/L (r0.9999), 10~200 μg/L (r0.9998), 10~200 μg/L (r0.9999) and 0.9~45 mg/L (r0.9998), respectively. The average recoveries were 94.5%~100.5% with the relative standard deviations of 0.63%~1.03%. The detection limits (S/N3) were 0.5 μg/L, 2.0 μg/L, 5.0 μg/L and 0.9 mg/L for F~, Cl~, Br~ and PF~6, respectively. The method has been applied to determine hexafluorophosphate and other trace impurity anions in ionic liquids with satisfactory results.

Key words: anion, hexafluorophosphate, ionic liquids (ILs) , ion chromatography (IC)