Microfabricated staged preconcentration and parallel column for gas chromatography

A microfabricated device for extracting and preconcentrating volatile analytes prior to gas chromatography comprising:

• a conduit, the conduit comprising:
• a first section, the first section comprising:
• a first section wall, the first section wall comprising a microfabrication substrate, a first section outer surface, and a first section inner surface, wherein the first section inner surface is coated with a first sorbent, and wherein the first sorbent comprises a first binding affinity for volatile analytes;
• an entrance port;
• and
• a first gas analyzer port, the first gas analyzer port comprising a first valve;
• an intermediate section, the intermediate section comprising a microfabrication substrate, an intermediate section outer surface, an intermediate section inner surface, and a moving phase port, the moving phase port comprising a moving phase valve;
• a second section, the second section comprising:
• a second section wall, the second section wall comprising a microfabrication substrate, a second section outer surface, and a second section inner surface, wherein the second section inner surface is coated with a second sorbent, and wherein the second sorbent comprises a second binding affinity for volatile analytes;
• an exit port;
• and
• a second gas analyzer port, the second gas analyzer port comprising a second valve,
• a thermal insulating material, wherein the thermal insulating material is positioned within the first section wall, the intermediate section wall, and the second section wall at a point of intersection between the first section and the intermediate section and between the intermediate section and the second section;
• wherein the first section, intermediate section, and second section are connected linearly.