the sample was evaporat- ed into a primary short col- umn .
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threat substances .
TeknoScan Sample Card Model ASC-1000
A handheld sampler unit featur- ing a Lithium battery and bottom air jets was used to assist in dis- lodging particulates adhering to surfaces and agitating the air inside an enclosure to induce air- borne particulates .
The front opening accommodates the sample card , all types of par- ticulate filters 30mm and 45mm diameters can also be accommo- dated .
The sample card was next inserted into a desorption module , where
The column is resistive- ly heated to vaporize the concentrated sample into the analytical GC column , or part of the sample is di- rected into the ionization source of the IMS detector , this is schematically shown in Figure 1 , below .
Detection limits for threat substances like explosives and narcotics vary from
Figure 1 : Schematic of Sample Pr
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