高等学校化学学报

高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (5): 856.doi:

• 研究快报 • 上一篇    下一篇

毛细管电泳直接分析与水不互溶溶液中痕量物质的新方法

方怀防, 曾昭睿, 刘岚, 庞代文   

  1. 武汉大学化学与分子科学学院, 武汉 430072
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-05-10 发布日期:2006-05-10
  • 通讯作者: 曾昭睿

A Novel Method for Capillary Electrophoresis Directly Analyzing Trace Amounts Analytes in the Water-immiscible Solution Samples

FANG Huai-Fang, ZENG Zhao-Rui*, LIU Lan, PANG Dai-Wen   

  1. College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-10 Published:2006-05-10
  • Contact: ZENG Zhao-Rui

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被引次数

12

摘要：

本文采用在线反萃取-场放大进样方法实现了毛细管电泳与溶剂微萃取的直接联用.

关键词: 溶剂微萃取; 在线反萃取; 场放大进样

Abstract:

This paper describes a novel method in which solvent microextraction(SME) is followed by on\|line back-extraction-field amplified sample injection(OLBE-FASI) in capillary zone electrophoresis(CZE). The water-immiscible solution sample, sealed with water plug in the sample vial, was used for direct electroinjection. The water plug with moderate content of organic solvent, low-conductivity, and the presence of a small amount of H+ provided the highest sensitivity for analyzing positively chargeable compounds, such as cocaine and thebaine. The linear range was 0.040—4, 0.040—2 μg/mL, with the square of the correlation coefficient(r2)>0.997, respectively. Detection limits were in the range of 5—10 ng/mL.

Key words: Solvent microextraction; On-line back-extraction; Field amplified sample injection

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