Sputtered alumina as a novel stationary phase for micro machined gas chromatography columns |
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Authors: | R Haudebourg Z Matouk E Zoghlami I Azzouz K Danaie P Sassiat D Thiebaut J Vial |
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Institution: | 1. Laboratoire Sciences Analytiques, Bioanalytiques et Miniaturisation, ESPCI Paristech, CNRS UMR PECSA, 7195, 10 rue Vauquelin, 75005, Paris, France 2. Schlumberger MEMS Technology Center, 10b rue Blaise Pascal, 78990, Elancourt, France
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Abstract: | Silica and graphite sputtering have previously been reported as novel solid stationary phase deposition techniques for micro gas chromatography columns. As a conventional solid stationary phase in gas chromatography, compatible with sputtering yet so far unreported, alumina was evaluated in this study. Alumina sputtered semi-packed micro columns were fabricated (including an activation step) and proved able to separate a mixture of volatile alkanes (C1–C4 with isomers) in less than 1 min. Kinetic and a thermodynamic evaluation led to calculation of 4,500 theoretical plates for ethane in 1.1 m (HETPmin?=?250 μm) and a Gibbs free energy for propane of 30.2 kJ mol?1, making this stationary phase’s properties very close to those observed with silica-sputtered micro columns. |
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