Hazardous material detection system

A hazardous material detection system comprising:

• gaseous sample introduction means for introducing a gaseous sample containing a substance stuck to a detection object from an inside of a detection object conveyance path, which serves to manage entrance and exit of the detection object;
• detection object detection means for outputting a detection signal if the detection object is in a detection region of the detection object conveyance path;
• ionization means for ionizing the gaseous sample introduced by the gaseous sample introduction means, in response to the detection signal;
• mass analysis means for analyzing mass of the gaseous sample ionized by the ionization means;
• and
• decision means for deciding whether the gaseous sample contains a hazardous material, based on an analysis result from the mass analysis means,
• wherein the ionization means ionizes the gaseous sample only for a set time in response to the detection signal.