18 10113 precision showed as relative standard

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Unformatted text preview: LUMN T. Hirano, S. Kitagawa and H. Ohtani Department of Materials Science and Engineerin g, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Japan E-mail: kitagawa.shinya@nitech.ac.jp In order to accomplish high throughput separation on high performance liquid chromatography (HPLC), monolithic columns attract much attention and are intensively studied because of their relatively low back pressure. The monolithic columns can be divided to silica- or polymer-based ones. The latter, polymer-based monolithic column is generally prepared by in situ thermal- or photo-polymerization of a reaction solution containing monomers and the characteristics of the column can be controlled by the polymerization conditions. In this study, an ultra low flow resistance butyl methacrylate -co-ethylene dimethacrylate based monolithic column was prepared with the low temperature ultraviolet photo polymerization. Both decrease in the flow resistance and enhancement in separation efficiency was achieved by the optimization of UV intensity and polymerization period. The flow resistanc e of the optimized column was reduced to 0.14 MPa/(mm/s), which correspond to 1/5 - 1/10 of that of conventional monolithic column. The minimum theoretical plate height for uracil was 6.7 μm at a linear flow rate of 0.5 mm/s. As the application of this ult ra low flow resistance column, the liquid chromatograph utilizing the vacuum system (without the conventional LC pump) was constructed and a separation of alkylbenzenes was successfully demonstrated. ANA-P9 SYNTHESIS OF GOLD NANOPARTICLES WITH ENRICHED (200) FACET BY CYCLIC VOLTAMMETRY Mohammad Etesami and Norita Mohamed School of Chemical Sciences, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: md.etesami@yahoo.com Gold nanoparticles can be prepared by chemical methods such as de position–precipitation, sol–gel technique, impregnation, co-precipitation, metal organic-chemical vapor deposition, incipient wetness and dip-coating. Electrochemical deposition is a simple and fast method for preparation of gold nanoparticles. In this work, the cyclic voltammetric technique was...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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