The measurements of viscosities and solubilities, the surface coating of capillary column

• Main Authors: Ruei-tsuei Lin, 林瑞村
• Other Authors: Guor-Tzo Wei
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/94700259837304987756

碩士 === 國立中正大學 === 化學所 === 97 === Abstract Recently, the growing interest in ionic liquids (ILs) has resulted in an exponential increase in the report being published. The applications of ionic liquids are widespread because of their low vapor pressure、low melting point、high polarity、relative non-flammability、high ionic conductivity、and thermally stability. It is important to know the viscosity, solubility, and other physicochemical properties. The instrument of capillary electrophoresis (CE) was employed to investigate the viscosity of IL and solubility of IL in water, due to the advantages of small sampling and automaticity of CE system along with the capability of simultaneous determination of trace analyte. For viscosity measurement, CE equipment was tested to be accurate for low to high viscosity liquid. The viscosity of a new prepared IL, [b-3c-i][NTf2], was measured to be 82c.p. Capillary electrochromatography (CEC) is a relatively new separation technique that combines the selectivity of high performance liquid chromatography (HPLC) with the high resolution and efficiency of capillary electrophoresis (CE). For this work, the silica surface was covalent bonded with ionic liquid to reverse the EOF. This posited charged column can reduce the adsorption of positive species and is intended to separate basic change and basic proteins. The bonded ionic liquid column successfully separated a mixture of benzoic acids with 50mM citrate/MeCN(90/10) running electrolyte.