Affordable Access

Publisher Website

Real-time monitoring of sub-ppb concentrations of aromatic volatiles with a MEMS-enabled miniaturized gas-chromatograph

Authors
Journal
Sensors and Actuators B Chemical
0925-4005
Publisher
Elsevier
Publication Date
Volume
141
Issue
1
Identifiers
DOI: 10.1016/j.snb.2009.06.021
Keywords
  • Gas Chromatography
  • Mox
  • Benzene
  • Mems
  • Environmental Monitoring
  • Utas

Abstract

Abstract Micromachined gas-chromatographic (GC) components in combination with high sensitivity MOX detectors and novel pre-concentration materials were utilized to develop a miniaturized, portable, stand-alone sub-ppb level monitoring system for aromatic volatile organic compounds (VOC). Using metal oxide semiconductor (MOX) gas sensors as detectors in a GC system, the intrinsic analytic selectivity of GC is exploited in a simplified architecture with on-board generated carrier gas. The work reported here includes the study of innovative pre-concentration materials, the micromachining of GC components and devices, the fabrication and characterization of complete system prototypes, and the development of application-specific control electronics. The results of both laboratory trials and successful real-world cross-validation with a reference analyzer are described.

There are no comments yet on this publication. Be the first to share your thoughts.