Chromatography Techniques

Chip Based Separations

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This includes a micro fabricated separation device. The availability of the fused-silica capillary marked a significant breakthrough for gas chromatography and all gas chromatographs manufactured were equipped to use fused silica capillary columns. Fused-silica capillaries have a huge contribution to the developments of other micro separation technologies like supercritical fluid chromatography. The success of one separation technique relies on sample introduction technologies, separation column and sensitive detectors that can preserve chromatographic fidelity of high resolution chromatographic peaks, as is evident from the many injectors and detectors optimized and available for open tubular GC. A particle packed column is comprised of a nano litre enrichment column and a micron or sub-micron separation column packed with suitable grade of C18. The HPLC-Chip is made from a biocompatible polyimide and the functionality of this chip is equivalent to conventional nanospray LC/MS.  Monoliths consist of a single rod of porous material with several unique features in terms of permeability and efficiency. Micro-fabricated column based on pillar-arrays were formed by arrays of nonporous silicon pillars with a diameter of approximately 4.3μm. The pillars were covalenty coated with a monolayer of hydrophobic C8-chains to enable reversed-phase LC separations.