This invention describes a multi-stage pre-concentrator device for use with a detector system. One pre-concentrator stage is detachable and may be used to collect sample remotely from the detection system. The detachable pre-concentrator stage mates with the detector system and can transfer its desorbed...http://www.google.com/patents/US8127595?utm_source=gb-gplus-sharePatent US8127595 - Pre-concentrator and sample interface
