Patent ID: 8011224

Claim:
A method of improving detection sensitivity of a chemical detector, the method comprising: (a) passing a fluid sample potentially having at least one target chemical through a sorbent material, thereby sorbing said at least one target chemical in said sorbent material; (b) generating conditions for said sorbent material to desorb said at least one target chemical of said sorbent material, thereby providing an enriched fluid sample; and (c) feeding the chemical detector with said enriched fluid sample; wherein said steps (a)-(c) are executed while allowing environmental fluids containing said at least one target chemical to enter the chemical detector and be detected thereby for existence of said at least one target chemical at all times, and wherein the environmental fluids that enters during said desorption, the environmental fluids that enters during said sorption and the environmental fluids in the environment contain similar concentrations of said at least one target chemical; thereby improving the detection sensitivity of the chemical detector.