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中文题名:

 基于新型辅助技术(V-ESSI/LTP)的催化发光传感器阵列    

姓名:

 韩佳颖    

学科代码:

 070302    

学科专业:

 分析化学    

学生类型:

 硕士    

学位:

 理学硕士    

学位年度:

 2014    

校区:

 北京校区培养    

学院:

 化学学院    

研究方向:

 光谱成像及芯片分析    

第一导师姓名:

 那娜    

第一导师单位:

 化学学院    

提交日期:

 2014-06-11    

答辩日期:

 2014-05-28    

中文摘要:
电子鼻和电子舌是迅速发展起来的新兴识别技术,其设计灵感源于生物学。这是一门以传感器、模式识别、计算机技术为主,融合化学、材料、电子技术和应用数学等多个领域的交叉学科。其出现为我们提供了一种精确可靠的嗅觉和味觉检测方法,并能够进行灵敏、快捷、系统、科学的鉴别与判定。近年来,电子鼻和电子舌系统在食品工业、医药研究和开发、环境监测、能源控制、化学工业和机器控制等领域得到广泛的应用。因此,对电子鼻和电子舌系统进行深入研究,以提高其工作性能,对当代科技发展具有重要意义和实际价值。本文主要研究内容为:一、本文发展了一种新型文丘里超声电喷雾离子化(Venturi electrosonic spray ionization,V-ESSI)自抽样技术,并首次将该技术与催化发光方法相结合,搭建了V-ESSI辅助催化发光传感器阵列系统。由于V-ESSI技术结合了文丘里自抽样功能和超声电喷雾离子化作用,与用于液体样品检测的传统催化发光方法相比,该系统中分析物产生的光信号强度显著增强。此外,V-ESSI装置用于传输液体样品的管路为熔融石英毛细管,样品用量非常小(约5 µL),改善了传统方法棘手的样品浪费、环境污染等缺点。将V-ESSI催化发光传感器阵列用于对不同溶液样品的检测,并借助经典线性判别分析方法,对所得数据矩阵进行处理及分析。结果表明,V-ESSI催化发光传感器阵列不仅能有效区分不同糖溶液样品,并能准确识别糖尿病患者尿液中的不同尿糖含量。本方法灵敏度高,重复性好,稳定性高,并具有较宽的线性检测范围。此外,本方法还实现了对液体样品的自抽样,有利于实现实时在线检测。作为新型电子舌系统,它提供了一种对溶液样品进行简便快捷、能耗低、价格低廉、使用寿命长且对环境友好的识别手段。该方法的建立,不仅促进了催化发光方法在溶液样品检测领域的发展,更为电子舌的构建开拓了新途径,有望应用于临床诊断、环境监测、工业控制、食品工业及多样性海洋监测。二、本文结合低温等离子体(Low Temperature Plasma, LTP)活化效应和传感器阵列的交叉响应性,建立了LTP辅助催化发光传感器阵列系统。在LTP辅助作用下,催化发光检测系统对样品的检测性能显著提高。作为一种新型电子鼻系统,该方法实现了对气体分子的快速、精确区分。等离子体对样品分子和催化剂的活化作用,有效改善了催化发光系统的性能,降低了系统工作温度,为发展简便快速、低价节能、低温检测的催化发光传感器阵列奠定了基础。
外文摘要:
Electronic nose and electronic tongue are rapidly developing emerging recognition technologies. We call them artificial sensory systems, .and their design inspiration come from biology. This novel technique mainly consists of sensor, recognition pattern and computer. It also covers a wide range of areas, including chemical, material, electronic technology, and applied mathematics. The emergence of this artificial technology provides us with an accurate and reliable method for determination of olfaction and taste. Thus, it can carry out sensitive, rapid, systematic and scientific identification and determination. In recent years, electronic nose and electronic tongue have been widely used in many areas, such as food industry, pharmaceutical research and development, environmental monitoring, energy control, chemical industry and machinery control and so forth. Hence, it will be significant and practical significance for contemporary science and technology development to the depth study and improvement of the electronic nose and electronic tongue system. The main research contents are as following:1. A new type of Venturi electrosonic spray ionization (V-ESSI) self-pumping injection device was built in this article. Integrating this self-pumping injection device with catalytic luminescence method, the V-ESSI assisted cataluminescence sensor array system was fabricated. Because of the combination of the venturi effect of automatic sampling and ionization effect of acoustic spray ionization source, compared with the traditional way, the signal obtained from this system is significantly enhanced. Meanwhile, this novel method provides higher sensitivity and discrimination. In addition, due to the sample transmission section of V-ESSI device is composed of used the fused silica capillary, this system use very small (about 5 µL) dosage of samples, which is an effective improvement for the shortcomings of sample waste and environmental pollution. V-ESSI cataluminescence sensor array was used for the detection of different type liquid samples. Using the classical linear discriminant analysis method to analysis the data matrix, V-ESSI cataluminescence sensor array can not only realized the detection and discrimination of different sugar solution samples, but distinguish urine sugar content level accurately. As a new type of electronic tongue system, which has good repeatability, wide linear range, high sensitivity, and can realize the simple, rapid, cheap energy saving, durable and environmentally friendly recognition for the sample. Furthermore, this method realizes the self-pumping for liquid samples, which is beneficial to achieve the on-line real time detection. The establishment of this method is not only promoted the development of the cataluminescence method in solution samples tested, but opens up a new way to build electronic tongue, which is expected to be applied to clinical diagnosis, environmental monitoring, industrial control, food industry and the diversity of marine monitoring.2. Combined with active effect of low temperature plasma and cross responsiveness of sensor array, LTP assisted cataluminescence system was built. With the help of the LTP assisted function, the signals produced by cataluminescence system increased significantly. As a new type of electronic nose system, this method realizes the detection of gas molecule samples in a fast and accurate way. Based on the activation of plasma for the sample molecular and catalysts, the performance of cataluminescence system was improved effectively, and the working temperature was reduced, which laid a foundation for the development of quick, low energy, low temperature testing of cataluminescence sensor array.
参考文献总数:

 156    

馆藏号:

 硕070302/1402    

开放日期:

 2014-06-11    

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