Method and Apparatus for Extraction, Detection, and Characterization of Vapors from Explosives, Taggants in Explosives, Controlled Substances, and Biohazards

摘要

An improved method of extraction, detection, and characterization of a vapor from an explosive, a taggant in an explosive, a controlled substance, a biohazard, and mixtures thereof uses a new and improved SPME device for extraction and ion mobility spectrometry for detection and characterization. The new and improved SPME device has an increased capacity to sorb a target vapor. The increased sorption of vapor provides for more accurate detection by an ion mobility spectrometer. A SPME device having increased surface area may be exposed to an atmosphere in an enclosure containing a test object or a volume of gas that was in contact with the test object to allow for sorption of the target vapor and then introduced into an IMS for more accurate detection and characterization of the vapor due to the increased sorption of the vapor by the SPME device described herein.

主权项

1. A method of forming a SPME device, comprising the steps of:
preparing a volatile compound sorptive coating mixture, providing a substrate having a size and shape for introduction into a sample receiving area of an ion mobility spectrometer; coating the substrate with the volatile compound sorptive coating mixture to form a volatile compound sorptive coating that is capable of sorbing a vapor from a material selected from the group consisting of an explosive, a taggant in an explosive, a controlled substance, a biohazard, and mixtures thereof; andproviding a surface area on the SPME device of at least 25 mm2.