for improved selectivity
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United States of America Patent
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Sep 11, 2018
Grant Date -
Aug 18, 2016
app pub date -
Oct 7, 2014
filing date -
Nov 7, 2013
priority date (Note) -
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Abstract
Systems and methods are provided for selecting and fragmenting a first precursor ion in an MS3 experiment. One or more first excitation parameters are calculated that define a first dipole excitation using a processor. The first dipole excitation is used to select a first precursor ion and fragment the first precursor ion to produce a second precursor ion. The first dipole excitation is applied to the continuous beam of ions by sending a first set of data including the first excitation parameters to a mass spectrometer. The first set of data is sent so that a first quadrupole applies the first dipole excitation to a continuous beam of ions. The mass spectrometer includes an ion source that provides the continuous beam of ions and the first quadrupole that receives the continuous beam of ions and is adapted to apply dipole excitation to the continuous beam of ions.
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