Modeling transport in gas chromatography columns for the Micro-ChemLab

摘要

Abstract: The gas chromatography (GC) column is a critical component in the microsystem for chemical detection ($mu@ChemLab$+TM$/) being developed at Sandia. The goal is to etch a `meter-long' GC column onto a 1-cm$+2$/ silicon chip while maintaining good chromatographic performance. Our design strategy is to use modeling and simulation approach. We have developed an analytical tool that models the transport and surface interaction process to achieve an optimized design of the GC column. This analytical tool has a flow module and a separation module. The flow module considers both the compressibility and slip flow effects that may significantly influence the gas transport in a long and narrow column. The separation module models analyte transport and physico-chemical interaction with the coated surface in the GC column. It predicts the column efficiency and performance. Results of our analysis will be presented in this paper.!13