The Government of the United States of America, As Represented by the Secretary of Homeland Security

Signature Science, LLC

John Brady

Barry Thomas Smith

Joseph A Dicicco

Andrew Horan

Paul M Flanigan, Iv

Joseph DiCicco

David Perry

Jeffrey Brian Barber

A media holder can be used for preparing samples. The media holder can comprise a base, a pair of walls extending upwardly from the base, and a plurality of transverse members positioned on and coupled to a respective upper end of each of the walls. Each of the transverse members can define a receiving slot for receiving at least a portion of a media therein.

Media holders with cross members for sample preparation

Media holders with sub-members for sample preparation

Disclosed is a filter conditioning unit for cleaning and conditioning high-volume sampling (HVS) filters. The unit includes, among other elements, a filter tray suitable for holding one or more HVS filters, a manifold in which the filter tray is inserted, and an optional enclosure for safety. The manifold is suitable for heating the filter tray and filters therein to a desired temperature while purge gas is introduced to the manifold. Also described herein is a method of using the filter conditioning unit.

Filter conditioning unit for high-volume sampling filters

Disclosed is a mixing chamber apparatus suitable for high-volume sampling (HVS) application. The mixing chamber apparatus includes, among other elements, inlet and outlet manifolds, a mixing chamber, and a tubing manifold for the introduction of clean, turbulent air into the mixing chamber. The inlet manifold defines a plurality of vapor ports that can be in fluid communication with one or more vapor sources to be sampled and mixed within the mixing chamber. Also described herein is a baffled mixing system that can be used alone or in combination with the disclosed mixing chamber apparatus.

Mixing chamber apparatus for high-volume sampling

Media holder for sample preparation

Disclosed is a thermal desorber assembly for desorbing substances collected on a high-volume sampling (HVS) filter. The assembly includes, among other elements, a filter holder for securing a HVS filter within the assembly, a desorber body, and an insulating enclosure. The design of the thermal desorber assembly is such that it can accommodate a variety of different types of HVS filter media. Also described herein is a system comprising the thermal desorber assembly and method of using the assembly.

Thermal desorber assembly for high-volume sampling filters

Examples are directed toward systems and methods relating to collecting and analyzing samples. For example, a system includes a cold trap that directly collects a sample. The cold trap operates to serve as a collection filter while the system draws in a flow across the cold trap. A thermal heater, coupled to the cold trap, flash heats the cold trap to produce a released sample from the cold trap at a release concentration. An analyzer entrains the released sample at the release concentration into a sampling flow of the analyzer for analysis.

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Medford, NJ, United States of America

John Brady