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相关概念视频

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
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相关实验视频

Updated: Jan 11, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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在小型四通道线性离子陷阵列中模拟单向离子弹射.

Yunfan He1,2, Zhuoqing Yang1,2, Yan Zhang1,2

  • 1School of Integrated Circuits, Shanghai Jiao Tong University, Shanghai 200240, China.

Sensors (Basel, Switzerland)
|November 13, 2025
PubMed
概括

一个新的小型四通道线性离子陷阵列 (M-FLITA) 增强了芯片规模的质谱仪. 这种离子陷设计提高了质量分辨率和离子储存能力,用于快速化学分析.

关键词:
电场模拟电场模拟器质量分辨率的大规模分辨率.微型四通道线性离子陷阵列.结构优化结构优化单向的离子喷射是一种单向的离子喷射.

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科学领域:

  • 分析化学 分析化学
  • 发展工具发展工具
  • 质谱测量质量谱测量

背景情况:

  • 芯片尺度质谱仪对于实时化学分析至关重要.
  • 离子陷是首选的质量分析仪,但在小型化时面临灵敏度和动态范围的限制.
  • 在较小的离子陷中减少的离子储存容量阻碍了性能.

研究的目的:

  • 开发和优化小型四通道线性离子陷阵列 (M-FLITA) 用于芯片规模质谱.
  • 为了解决微型离子陷的局限性,特别是离子储存能力和灵敏度.
  • 为了提高微型质量分析仪的质量分辨率和动态范围.

主要方法:

  • 设计并建立了一个小型的四通道线性离子陷阵列 (M-FLITA),使用高压电极和1毫米的场半径.
  • 实施了不对称的射频 (RF) 电压,以实现单向离子弹射.
  • 优化了M-FLITA结构,包括延伸配置,以增强性能指标.

主要成果:

  • 在拉伸的M-FLITA结构中实现了732的质量分辨率.
  • 保持了96%的高单向离子喷射效率.
  • 在高离子流条件下显示出优越的离子储存能力和质量分辨率.

结论:

  • M-FLITA为芯片规模质谱仪中的高性能微型质量分析仪提供了可行的解决方案.
  • 优化的设计克服了小型化挑战,提高了灵敏度和动态范围.
  • 这一进步支持了对动态,实时和快速定性化学分析的需求.