微型全分析系统

系统阐述了分析化学新兴研究领域微型全化学分析系统（μ－ＴＡＳ）的概念和原理,并对其应用现状及发展趋势进行了综述。     

微型全化学分析系统

微型全化学分析系统，是微芯片的概念，来自计算机芯片的发展，至今不过几年时间，但进展神速，国外迄今已有近百家公司从事微芯片相关工艺、设备及检测手段和软件的发展。     

微全分析系统专用微型电源的研制

芯片毛细管电泳(Chip-CE)是当前微全分析系统(μ-TAS)中最活跃的领域和发展前沿.Chip-CE包括微芯片、高压电源和检测器等3个主要部分.     

微全分析系统中的电色谱分离技术

微全分析系统(μ-TAS)近年来发展非常迅速,出现了各种各样思路新颖,设计独特的芯片分析系统。本文着重从分离模式方面介绍了μ-TAS的一个新的发展方向——电色谱。由于电色谱技术兼具高效液相色谱的高选择性和毛细管电泳的高效性,因此具有广阔的应用前景。     

微型全化学分析系统及技术进展

对微型全化学分析系统(μ-TAS)的发展现状及其应用领域进行了综述,对μ-TAS在毛细管电泳微型化、DNA及生化分析、组合化学研究等领域的应用研究作了重点介绍.     

微型全分析系统中的电化学检测方法

结合微型全分析系统（μ-TAS)的需要和特点,根据电化学检测的原理和应用特点,阐述了含电化学检测器的微芯片系统的设计与制作,综述了微型全分析系统中安培法、电导法、电位法的应用和研究的最新进展,并分析了电化学检测做芯片的发展趋势。     

第五届微型化学分析与生物分析(2001μ-TAS)国际会议简介

这次会议的正式名称为"第五届微型化学分析与生物分析国际会议",由美国加利福尼亚洲分离科学学会主办,于2001年10月21日～25日在Monterey会议中心召开.     

第四届全国微全分析系统会议在大连召开

不久前，第四届全国微全分析系统会议（μ-TAS 2007）在大连海天白云大酒店隆重召开。此次会议由中国化学会、国家自然科学基金委员会化学部主办。微全分析系统是芯片实验室的重要组成部分，从20世纪末开始发展至今以其众多潜在优势和广阔应用前景受到世界范围的关注，被认为是21世纪重要科学技术平台之一。     

分析化学中的分离技术

本文是《分析试验室》定期评述中“分析化学中的分离技术”开篇。主要评述了 1 995年至 2 0 0 0年国内分析化学中的分离技术的发展。内容分概述、沉淀 -共沉淀、萃取、静态与动态吸附及新技术 ,如浮选、膜分离、超临界流体萃取、分子烙印等。引用文献 4 64篇     

微分析系统对苯二酚抑制化学发光的研究

在自行设计和制作的有机玻璃 (PMMA)微流控芯片上 ,以流动注射方式进样 ,利用对苯二酚对Luminol H2 O2 Co2 +体系化学发光 (CL)的强抑制作用 ,建立了间接测定对苯二酚含量的微型全化学分析系统 ( μ TAS)。对影响化学发光反应的各因素进行优化 ,对芯片结构的设计和反应过程进行探讨 ,设计并制作出适合该反应体系的芯片。在合成水样对苯二酚的测定中 ,化学发光强度的变化与对苯二酚的浓度在 1 .0× 1 0 - 7～ 2 .0× 1 0 - 8mol/L范围内成良好线性关系 ,检出限达 2 .0× 1 0 - 9mol/L。     

安培检测的微型全分析系统设计

本文综述了近年来微流控化学芯片的主要电化学检测方法——安培法的最新研究进展及应用。重点讨论了微芯片上电化学检测系统及其接口的设计与制作;同时简述了样品在芯片上的衍生化过程;进一步探讨和展望了带电化学检测器的微流控化学芯片的发展前景。     

Micro-separation toward systems biology

Current biology is experiencing transformation in logic or philosophy that forces us to reevaluate the concept of cell, tissue or entire organism as a collection of individual components. Systems biology that aims at understanding biological system at the systems level is an emerging research area, which involves interdisciplinary collaborations of life sciences, computational and mathematical sciences, systems engineering, and analytical technology, etc. For analytical chemistry, developing innovative methods to meet the requirement of systems biology represents new challenges as also opportunities and responsibility. In this review, systems biology-oriented micro-separation technologies are introduced for comprehensive profiling of genome, proteome and metabolome, characterization of biomolecules interaction and single cell analysis such as capillary electrophoresis, ultra-thin layer gel electrophoresis, micro-column liquid chromatography, and their multidimensional combinations, parallel integrations, microfabricated formats, and nano technology involvement. Future challenges and directions are also suggested.     

Miniaturized Sequencing Gel System for Quick Analysis of DNA by Hydroxyl Radical Cleavage

We described a simple and quick miniaturized sequencing gel system for DNA analysis. Two major modifications were made to the previously reported miniaturized DNA sequencing gel system to achieve high-resolution hydroxyl radical cleavage analysis: including formamide in the miniaturized gel and providing uniform heating during electrophoresis. Our method enables one to reduce the cost for chemicals and to significantly reduce electrophoresis time. Furthermore, minimal gel handling simplifies the entire process. We show that the resolution of DNA fragments obtained by hydroxyl radical cleavage for the miniaturized gel is similar to that of a large conventional sequencing gel.     

Miniaturized CE System Based on Amperometric Detection and Horizontal Sampling

A novel miniaturized capillary electrophoresis (CE)-amperometric detection system has been fabricated by integrating a self-positioning electrode system and a 10-cm piece of fused silica capillary on a Plexiglas base plate. The self-positioning electrode system was composed of a disc working electrode positioned opposite the outlet of the capillary, with an Ag/AgCl reference electrode, a platinum auxiliary electrode, and a platinum grounding electrode accommodated in a rectangular detection cell on the plate. The platinum wire, close to the inlet of capillary, served as a contact to the high-voltage power supply. Alternate placement of the capillary inlet in vials containing sample or buffer solutions permits volume-defined electrokinetic sample introduction in a horizontal arrangement. Performance of this unique system was demonstrated by separating sugars, amino acids, and two phenols used in the pharmaceutical industry. The factors influencing the analytical performance of the new microsystem for the separation of p-aminophenol and acetaminophen have been characterized and optimized. The two analytes could be separated on baseline within 160s in 50mM acetate buffer (pH 5.0). Responses for p-aminophenol and acetaminophen were linear over the range of 10 to 1000µM with detection limits (S/N=3) of 2.1 and 2.9µM.     

Micro-separation and identification of forty-six cations by all glass nichrome wire ring chamber

Summary An all glass nichrome wire ring chamber for the separation and identification of 46 metal ions from a single drop of test solution is described. Before analysis, the cations are separated into 6 groups by liquid-liquid extraction. The total analysis takes about 1 hour and the method holds an excellent promise for the identification of airborne particulates and trace elements from blood, bone, tissues, food materials, etc.

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Zusammenfassung Die Trennung und Identifizierung von 46 Metallionen in einem Tropfen Probelösung mit Hilfe eines aus Glas und Nichromdraht gefertigten Gerätes wurde beschrieben. Vor der Analyse werden die Kationen durch flüssig-flüssig-Extraktion in sechs Gruppen aufgeteilt. Die Analyse selbst dauert etwal Stunde und ist besonders geeignet für Luftverunreinigungen und Spurenelemente in Blut, Knochen, Gewebe, Lebensmitteln u. dgl.