Apparatus for detecting chemical substances and method therefor

Radiant energy – Ionic separation or analysis – Methods

Reexamination Certificate

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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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Samantha L. Richards et al., “The Detection of Explosives Residues from Boarding Passes”, 7th International Symposium on Analysis and Detection of Explosives (2001), pp. 60-65.
Japanese Office Action dated Sep. 16, 2008 regarding Japanese Patent Application No. 2003-329294, in Japanese.

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