| 毛细管电泳电容耦合非接触电导检测器 |
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| 引用本文： | 曾凡亚,苏建坡,赵书俊,张书胜,张斌,卢艳艳. 毛细管电泳电容耦合非接触电导检测器[J]. 仪表技术与传感器, 2011, 0(12) |
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| 作者姓名： | 曾凡亚 苏建坡 赵书俊 张书胜 张斌 卢艳艳 |
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| 作者单位： | 1. 郑州大学物理工程学院,河南郑州,450001
2. 郑州大学化学系,河南郑州,450001 |
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| 基金项目： | 国家自然科学基金(21077095); 电分析化学国家重点实验室开放基金(2009002) |
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| 摘 要： | 设计了一种集激励、检测和数据采集功能于一体的毛细管电泳非接触电导检测器,采用文氏电桥振荡器产生激励信号,运用绝对值检波技术对检测信号进行处理,并设计USB数据采集电路和上位机软件,实现波形数据的采集、存储和图谱的绘制.介绍了其检测原理、电路结构及实现,使用葡萄糖(0.04 mol/L)+果糖(0.04 mol/L)+蔗糖(0.04 mol/L)样品进行了检测器重复性实验,并分离检测了6种酚酸,对检测器检测限作出评定.实验结果表明:峰保留时间和峰面积相对标准差分别小于1％和7.5％,对酚酸的最低检测限为5μg/mL(信噪比S/N =3),检测器灵敏度高、重复性好.
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| 关 键 词： | 毛细管电泳 非接触电导检测 文氏电桥振荡器 绝对值检波 |
Design of Capillary Electrophoresis Capacitively Coupled Contactless Conductivity Detector |
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| ZENG Fan-ya , SU Jian-po , ZHAO Shu-jun , ZHANG Shu-sheng , ZHANG Bin , LU Yan-yan. Design of Capillary Electrophoresis Capacitively Coupled Contactless Conductivity Detector[J]. Instrument Technique and Sensor, 2011, 0(12) |
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| Authors: | ZENG Fan-ya SU Jian-po ZHAO Shu-jun ZHANG Shu-sheng ZHANG Bin LU Yan-yan |
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| Affiliation: | ZENG Fan-ya1,SU Jian-po1,ZHAO Shu-jun1,ZHANG Shu-sheng2,ZHANG Bin1,LU Yan-yan2(1.College of Physics and Engineering,Zhengzhou University,Zhengzhou 450001,China,2.Department of Chemistry,China) |
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| Abstract: | A kind of capillary electrophoresis capacitively coupled contactless conductivity detector(CE-C4D) was designed,which had signal source,detection circuit and data acquisition unit.Wien bridge oscillator was used to get a signal source,and absolute value demodulation was used to process signals.And a data acquisition circuit with USB interface and software were designed to acquire and store the signal data and draw spectrum.The principle and circuit of CE-C4D were also introduced,glucose(0.04 mol/L)+fructose... |
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| Keywords: | capillary electrophoresis capacitively coupled contactless conductivity detection wien bridge oscillator absolute value demodulation |
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