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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

536
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...
536
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

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Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and signal-to-noise ratio for the analyte. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.
Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called collision-induced...
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Phase Modulation to Increase Ion Throughput for Ion Mobility-Time-of-Flight Experiments.

Nathan W Buzitis1, Daniel Wu1, Zackary Kinlein1

  • 1Department of Chemistry, Washington State University, Pullman, Washington 99164, United States.

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|May 19, 2025
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Summary
This summary is machine-generated.

Phased ion mobility spectrometry dramatically cuts analysis time by increasing duty cycle 10x over signal-averaged methods. This advancement in structures for lossless ion manipulation (SLIM) enhances efficiency without losing separation power.

Keywords:
InstrumentationIon Mobility SpectrometryMultiplexingStructures for Lossless Ion ManipulationTime of Flight MSTraveling Wave

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Area of Science:

  • Analytical Chemistry
  • Physical Chemistry
  • Spectrometry

Background:

  • Structures for Lossless Ion Manipulation (SLIM) offer advanced ion separation.
  • Traditional SLIM methods often have limited duty cycles, impacting analytical throughput.
  • Integrating SLIM with time-of-flight mass analyzers is crucial for comprehensive analysis.

Purpose of the Study:

  • To implement and evaluate a phase-based gating scheme for SLIM.
  • To enhance the analytical efficiency and duty cycle of SLIM experiments.
  • To assess the impact of phased gating on separative capabilities and resolving power.

Main Methods:

  • Development of a phase-based gating scheme for ion manipulation.
  • Integration of the phased gating system with a 6-m SLIM device and a time-of-flight mass analyzer.
  • Comparison of phased ion mobility spectrometry with signal-averaged SLIM experiments.

Main Results:

  • Phased ion mobility spectrometry achieved a 10x increase in duty cycle compared to signal-averaged SLIM.
  • Separative capabilities and resolving power were maintained in the phased mode.
  • The methodology allows for algebraic or direct determination of arrival time integers.

Conclusions:

  • Phase-based gating significantly enhances the duty cycle and ion efficiency of SLIM.
  • This approach reduces experimental analysis duration without compromising separation.
  • The method is readily integrable into existing ion mobility-mass spectrometry instrumentation.