MASS ANALYSIS SYSTEM WITH LOW PRESSURE DIFFERENTIAL MOBILITY SPECTROMETER
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United States of America Patent
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Issued Date -
Jul 28, 2011
app pub date -
Jan 28, 2011
filing date -
Jan 28, 2010
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Abandoned
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Abstract
A mass analysis system including a low pressure dissociation region and a differential mobility spectrometer. The differential mobility spectrometer including at least one pair of filter electrodes defining an ion flow path where the filter electrodes generate an electric field for passing through a selected portion of the sample ions based on the mobility characteristics of the sample ions. The differential mobility spectrometer also includes a voltage source that provides DC and RF voltages to at least one of the filter electrodes to generate the electric field, an ion inlet that receives sample ions that have passed through the low pressure dissociation region, and an ion outlet that outputs the selected portion of the sample ions. A mass spectrometer receives some or all of the selected portion of the sample ions.
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