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Showing 1 to 20 of 108 for “"stationary phases"”.
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Synthetic Chiral Stationary Phases in Enantioselective Liquid Chromatography
… edge interactions on a particular type of chiral stationary phase (CSP) used for chromatographic separations of enantiomers has been studied. Highly polarizable aromatic substituents, such as halogens, have been found to enhance $\pi - \pi$ face to face interactions and can be used in the designs …
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Design, Synthesis, and Applications of Chiral Stationary Phases
… separation of the enantiomers upon a chiral stationary phase. The aim of this research was to develop efficient and widely useful chiral stationary phases. Our approach to this problem was to synthesize a series of specific chiral compounds containing three sites for potential use in chiral …
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Polyethylene glycol stationary phases for capillary gas chromatography
… chromatographic properties of various silicone stationary phases for capillary gas chromatography have been extensively studied, yet the properties of nonsilicone phases have not been so well investigated. The most popular nonsilicone phases are the high molecular weight polyethylene glycols …
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Towards greener stationary phases : thermoresponsive and carbonaceous chromatographic supports
Polymers which are sensitive towards external physical, chemical and electrical stimuli are termed as ‘intelligent materials’ and are widely used in medical and engineering applications. Presently, polymers which can undergo a physical change when heat is applied at a certain temperature (cloud …
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Microfluidic Columns with Nanotechnology-Enabled Stationary Phases for Gas Chromatography
… of new column designs, introduction of new stationary phases and the development of novel fabrication methodologies for integrating functionalized thin-film into microchannels for chromatographic separations. As a part of this research, two high performance new micro column designs namely …
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Ionic Liquids in Micro Extractions and Gas Chromatographic Stationary Phases
… of using ionic liquids as gas chromatographic stationary phase has increased in recent years. The low volatility, tailorable physico-chemical property and high thermal stability of ionic liquids make them an ideal choice for gas chromatographic stationary phase. For the present research, …
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Investigations of chiral recognition of conformationally rigid chiral stationary phases
… the development of conformationally rigid chiral stationary phases (CSPs) has been a goal. Several conformationally rigid CSPs derived from $\alpha$-amino-lactams have been prepared and their abilities to separate the enantiomers of a variety of analytes have been evaluated. $\pi$-Acidic …
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Thermodynamic and kinetic investigation of chiral separations using polysaccharide stationary phases
Thesis (Ph. D.)--Michigan State University. Dept. of Chemistry, 2010
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Development and characterisation of monolithic silica stationary phases for ion chromatography
… and characterisation of novel monolithic stationary phases for the rapid separation o f inorganic and organic ions. A 10 cm bare silica monolith has been modified on-column with iminodiacetic acid (IDA) groups and characterised for its selectivity toward alkali, alkaline earth and selected …
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Applications of Brush-Type Chiral Stationary Phases in New Chromatographic Techniques
… important class of resolutions by which a chiral stationary phase (CSP) is utilized to affect the separation of a mixture of enantiomers to provide, as the end result, the single enantiomers of the mixture. In the studies described within, three areas involved in chiral discrimination are …
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Preparation and evaluation of several new pi-basic chiral stationary phases
Several new chiral stationary phases (CSPs) derived from $\alpha$-arylalkylamines and N-arylamino acids are evaluated based on their chromatographic performance. These new chiral stationary phases are useful for separation of the enantiomers of N-(3,5-dinitrobenzoyl) derivatized $\alpha$- and …
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A Rational Approach to the Design of Highly Effective Chiral Stationary Phases
… on a chromatography column containing a chiral stationary phase is emerging as an outstanding technique for the determination of enantiomeric purity, the assignment of absolute configuration and the preparative resolution of enantiomers. The continued growth of this technique depends upon the …
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Fundamental studies towards the fabrication of electroactive monolithic stationary phases in microfluidic channels
… goal of this project is to develop a monolithic stationary phase which utilises an electroactive polymer combining the advantages of EMLC, monolithic technology and microfluidic separation, thus creating an electroactive monolithic microchip (EMμ). In this thesis, fundamental studies towards the …
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