Chemical sampling and detection methods and apparatus

摘要

This invention describes a sample collection and desorption device and method that collects residues of explosives and other chemicals from a surface and then introduces them into a detector. The desorption method and device include introducing additional chemicals while heating up the sample collector, thus, the collected sample may be converted via a chemical reaction or a catalytic process. The detector can be an ion mobility spectrometer or mass spectrometer.

主权项

1. A chemical collection and desorption method comprising
(a) collecting a sample of interest onto a collector and/or preconcentrator; (b) putting the collector and/or preconcentrator into a thermal desorber after collecting the sample; (c) adding at least one additional substance to the thermal desorber and/or collector and/or preconcentrator, which may react with the sample; (d) heating the collector and/or preconcentrator to evaporate the sample; (e) transporting the sample and/or its reaction products to a detector where the sample is ionized and analyzed.