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相关概念视频

Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

219
Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...
219
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

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Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
357

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A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
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模块化基于芯片的纳米SFC-MS用于超快速分离.

Chris Weise1, Martin Schirmer2, Matthias Polack1

  • 1University Leipzig, Linnestrasse 3, Leipzig 04103, Germany.

Analytical chemistry
|August 17, 2024
PubMed
概括

这项研究引入了一种小型化的超临界流体染色学质谱仪装置,用于快速的奇拉分离. 基于芯片的系统实现了高速,可重复的结果,采样量和移动阶段数量最小.

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科学领域:

  • 分析化学 分析化学
  • 分离科学 分离科学
  • 质谱测量质量谱测量

背景情况:

  • 超临界流体色谱 (SFC) 是一种强大的分离技术.
  • 分析仪器的小型化在速度和灵敏度方面提供了优势.
  • 将SFC与质谱学 (MS) 结合起来,可以提高检测能力.

研究的目的:

  • 开发一个小型的,基于芯片的设备,用于超临界流体染色学与质谱学 (SFC-MS) 结合.
  • 为了使用开发的nanoSFC系统实现高速和可重复的合分离.
  • 在转移到大气压MS接口时保持色谱完整性.

主要方法:

  • 开发一个模块化,基于芯片的纳米SFC系统,配有颗粒包装的纳米孔柱.
  • 微流体组件的集成,用于精确的样品负载 (picoliter体积) 和逆压控制.
  • 使用限制性发射器和最小后列体积 (16nL) 来防止减压和稀释.

主要成果:

  • 开发的设备成功地在不到80秒的时间内完成了高速合分离.
  • 在染色分离方面实现了高可重现性.
  • 该系统有效地将分析物转移到MS接口,而不会损害染色学完整性.

结论:

  • 微型化,基于芯片的nanoSFC-MS设备对快速和可复制的性分离是有效的.
  • 该设计克服了与移动相解压和分析剂稀释相关的挑战.
  • 这种方法为高吞吐量和抗分离分析提供了一个有前途的平台.