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Related Concept Videos

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 reduce chemical noise during analyte detection. 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...
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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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The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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Compact E x B mass separator for heavy ion beams.

M Wada1, T Hashino, F Hirata

  • 1Graduate School of Engineering, Doshisha University, Kyotanabe, Kyoto, Japan. mwada@mail.doshisha.ac.jp

The Review of Scientific Instruments
|March 5, 2008
PubMed
Summary
This summary is machine-generated.

A novel E x B mass separator was developed and tested, confirming its operational principle. Experimental results validated theoretical predictions for ion deflection based on mass and electric fields.

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Area of Science:

  • Physics
  • Mass Spectrometry
  • Applied Electromagnetism

Background:

  • Mass separators are crucial for isolating ions based on their mass-to-charge ratio.
  • Existing designs often face limitations in compactness and tunability.

Purpose of the Study:

  • To design and build a compact E x B mass separator.
  • To experimentally validate the principle of operation for this novel mass separator design.

Main Methods:

  • A compact E x B mass separator was constructed within a shielding box.
  • An electromagnet was used to generate a variable magnetic field for mass separation.
  • Experimental data was collected and compared with theoretical predictions.

Main Results:

  • The experimental results closely matched theoretical predictions.
  • Larger mass ions were deflected with a weaker magnetic field when an electric field was applied.
  • The impact of the deflection electric field on mass separation resolving power was quantified.

Conclusions:

  • The compact E x B mass separator successfully demonstrated its principle of operation.
  • The device shows promise for tunable and efficient mass separation.
  • Further investigation into resolving power reduction is essential for optimization.