A microtrap assembly includes a carbon nanotube sorbent. The microtrap assembly may be employed as a preconcentrator operable to deliver a sample to an analytical device to measure the concentrations of greenhouse gases. A system includes a microtrap having a carbon nanotube sorbent for measuring the concentrations of greenhouse gases in a sample.
The United States government may have certain rights in this invention. A portion of the work described herein was supported in part by the Department of Energy under Grant DE-FG02-07ER84894.