Ion attachment mass spectrometry apparatus
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United States of America Patent
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Apr 10, 2007
Grant Date -
Aug 3, 2006
app pub date -
Mar 22, 2006
filing date -
Mar 31, 2003
priority date (Note) -
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Abstract
An ion attachment mass spectrometry apparatus causing positively charged metal ions to attach to molecules of a gas to be measured in an attachment region to generate attached ions and then performing mass spectrometry on the attached ions by a mass spectrometer, has a metal ion selective disassociation unit for selectively making the metal ions attached to the specific molecules in the attachment region disassociate. By making the metal ions attached to the specific molecules such as H.sub.2O disassociate, a state is formed where the metal ions are attached to only the sample gas to be measured and the reliability of measurement of the gas is improved.
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