Effect of micropillar density on separation efficiency of semi-packed micro gas chromatographic columns

In this report, the effect on the separation efficiency of the density of square micropillars in semi-packed gas chromatography columns are investigated. Two columns with the same pillar arrangement but different pillar density were experimentally characterized and simulated. The experimental results show that the high pillar density column is 1.2 times superior to the low pillar density column with respect to the separation efficiency. Good consistency between simulated and observed band broadening of the peaks was found.