In recent years, the resolving power of ion mobility instruments has been increased significantly, enabling ion mobility spectrometry (IMS) to be utilized as an analytical separation technique for complex mixtures. In theory, decreasing the drift tube temperature results in increased resolution due to decreased ion diffusion. However, the heat requirements for complete ion desolvation with elec...

A micro-flow separation system was developed using an open capillary, fused-silica or polyethylene tube, and an aqueous-organic mixture (water-acetonitrile-ethyl acetate mixture) as a carrier solution. A model analyte solution containing 2,6-naphthalenedisulfonic acid and 1-naphthol was injected into the capillary tube by a gravity method. The analyte solution was subsequently delivered through...

The flow characteristics of the supercritical fluid in micro-fin tube is theoretical basis for development heat transfer enhancement and resistance reduction tube. For tubes with different fin shapes, this paper considered physical properties nitrogen state adopted enhanced wall function, reasonable turbulence equations, control etc., to numerically simulate a 2 mm under pressure. distribution ...

With the application of supercritical fluid heat transfer equipment in industrial fields such as solar thermal power generation, chemical industry, aerospace, etc., studying characteristics micro-fin tubes has become a key theoretical basis for development low-resistance enhancement technology. In view with different fin shapes, this paper took into account thermophysical properties nitrogen un...

A simple precipitation process followed with the heat treatment was developed to synthesize ZnO micro-tubes by self-assembly of nanoflakes composed of nanoparticles. The resulting ZnO micro-tubes demonstrated excellent photocatalytic performance in degrading methylene blue (MB) under UV illumination. It was found that NH4+ ion played a critical role in directing the assembly of the nanoflakes t...