An integrated vapor source with a porous silicon wick.
Wallner-JZ; Kunt-KS; Obanionwu-H; Oborny-MC; Bergstrom-PL; Zellers-ET
Phys Status Solidi A Appl Mater Sci 2007 May; 204(5):1449-1453
A micro vapor source has been developed for calibrating micro gas chromatograph (uGC) systems. By utilizing a porous silicon wick in a micro diffusion system, vapor generation with excellent stability has been achieved. The source has shown uniform and repeatable vapor generation for n-decane with less than a 0.1% variation in 9 hours, and less than a 0.5% variation in rate over 7 days. The evolution rate follows the diffusion model as expected, although the room temperature rate is higher than theoretically predicted. Equipped with a refillable reservoir, this vapor source is suitable for extended uGC field deployment.
Gas-chromatography; Vapors; Diffusion-analysis; Temperature-effects; Temperature-control; Analytical-processes; Volatiles; Organic-compounds; Laboratory-testing; Monitoring-systems; Air-samples;
Author Keywords: 51.20.+d; 85.85.+j
Physica Status Solidi A, Applications and Materials Science
University of Michigan, Ann Arbor