Radiant energy – Ionic separation or analysis – Methods
Reexamination Certificate
2008-07-14
2010-10-26
Vanore, David A (Department: 2881)
Radiant energy
Ionic separation or analysis
Methods
C250S284000, C250S286000, C250S287000, C250S288000, C073S866000
Reexamination Certificate
active
07820965
ABSTRACT:
An apparatus for detecting chemical substances which is high in sensitivity and selectivity is provided.An organic acid or an organic acid salt is used to generate an organic acid gas from an organic acid gas generator3to be mixed with a sample gas for introduction into an ion source4for ionization, thereby obtaining a mass spectrum by a mass analysis region5. A data processor6determines the detection or non-detection of a specific m/z of an organic acid adduct ion obtained by adding a molecule generated from the organic acid to a molecule with specific m/z generated from a target chemical substance to be detected based on the obtained mass spectrum. When there is an ion peak with the m/z of the organic acid adduct ion, the presence of the target chemical substance to be detected is determined, and an alarm is sounded.False detection can be prevented.
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Nagano Hisashi
Takada Yasuaki
Waki Izumi
A. Marquez, Esq. Juan Carlos
Hitachi , Ltd.
Stites & Harbison PLLC
Vanore David A
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