作者: Stephanie Jung , Alexandra Höltzel , Steffen Ehlert , Jose-Angel Mora , Karsten Kraiczek
DOI: 10.1021/AC902069X
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摘要: This work investigates the impact of conduit geometry on chromatographic performance typical particulate microchip packings. For this purpose, high-performance liquid chromatography (HPLC)/UV-microchips with separation channels quadratic, trapezoidal, or Gaussian cross section were fabricated by direct laser ablation and lamination multiple polyimide layers then slurry-packed either 3 5 μm spherical porous C8−silica particles under optimized packing conditions. Experimentally determined plate height curves for empty microchannels are compared dispersion coefficients from theoretical calculations. Packing densities various packings presented conclusively explained. The display a high density irrespective their geometries, reflects behavior channels. Dispersion in correlates achieved densities, which limited ...