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  • Mass Spectrometry
    A linear quadrupole mass analyzer consists of four hyperbolically or cylindrically shaped rod electrodes extending in the z-direction and mounted in a square con- figuration (xy-plane, Figs. 4.25, 4.26).
  • Mass Spectrometry
    The evolving fragments are mass-analyzed by means of a lin- ear quadrupole mass analyzer at right angles to the incident ion beam (Fig. 2.28).
  • Handbook of Elemental Speciation: Techniques and Methodology Complete Document
    However, ICP-MS offers superior limits of detection because of the large signal-tonoise ratios that result from the use of a quadrupole mass analyzer .
  • The Cassini Ion and Neutral Mass Spectrometer (INMS) Investigation
    The INMS instrument consists of a closed ion source and an open ion source, various focusing lenses, an electrostatic quadrupole switching lens, a radio frequency quadrupole mass analyzer , two secondary electron multiplier detectors, and the associated supporting electronics and power supply systems.
  • Handbook of Elemental Speciation: Techniques and Methodology - Chapter 5 Detection
    Ray and Hieftje have recently described a tandem microwave plasma torch – atmospheric sampling glow discharge (MPT-ASGD) apparatus mounted on a quadrupole mass analyzer [30].
  • Protein Interactions
    A Q-ToF MS=MS experiment uses the first quadrupole mass analyzer to isolate a ‘‘parent’’ ion of specific m=z from the mixture of ions present in the gas phase (Figure 15.6a); this ion is then thermally excited by acceleration...
  • Food Analysis
    When the repeller plate at the back of the source is positively charged, it repels the positive fragments toward the quadrupole mass analyzer .
  • Proteomics in Foods
    The accuracy of quadrupole mass analyzers allows selection of specific peptide ions and analysis of fragment ions from MS-MS to within at least ±0.5 amu of their true m/z values.
  • Protein and Peptide Analysis by Mass Spectrometry
    Schematic of a quadrupole mass analyzer .