Patent Document ID: 9399912
Application ID: 14022960
Patent Flag: 1

Claim One:
1. A passive kinetic sampler for quantitative passive soil vapor concentration measurement comprising: a container filled with a sorbent medium and having an opening; a thin film, hydrophobic membrane, covering the container opening; a cap having an opening; a cap having an opening, the cap disposed over the membrane, thereby creating a container seal while exposing the membrane through the cap opening; and the membrane having a uniform thickness; wherein the membrane constrains the uptake rate to match values that minimize or eliminate a starvation effect as calculated via mathematical models; wherein the mathematical models derive the relationship between the delivery rate of vapors to a void space in which a passive sampler is deployed and the soil moisture and porosity; and wherein the uptake rate as constrained by the membrane of the sampler is less than or about the delivery rate of vapors from surrounding soil, so the concentration of vapors in the void space within which the sampler is exposed is similar to the concentration in the surrounding soil gas throughout the majority of the sampling interval.