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Showing 1 to 20 of 199 for “"Capillary electrophoresis"”.
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Velocity-difference induced focusing in capillary electrophoresis and preparative capillary electrophoresis
… focusing (V-DIF) with a dynamic pH junction in capillary electrophoresis (CE) using a sample with a pH different from that of the background electrolyte (BGE) was developed in our group, but the mechanism was not well understood. In this work, the mechanism of this focusing technique was first …
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Selectivity and detection in capillary electrophoresis
… of the selectivity and detection limitations in capillary electrophoresis. A more practical design of an electrochemical detector is introduced with simultaneous on-line UV detection¹, for the selective detection of a number of pungent and neurological compounds, the piperines and the …
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Square-wave voltammetry detection for capillary electrophoresis
While the development and application of capillary electrophoresis (CE) has matured significantly in the last two decades, its application to trace analysis has been limited by The lack of a generally applicable, Sensitive detection method. This Ph.D. project's aim was to develop such a method …
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Novel absorption detection techniques for capillary electrophoresis
<p>Capillary electrophoresis (CE) has emerged as one of the most versatile separation methods. However, efficient separation is not sufficient unless coupled to adequate detection. The narrow inner diameter (I. D.) of the capillary column raises a big challenge to detection methods. For UV-vis …
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Using Capillary Electrophoresis for High-Throughput Molecular Screening
… enrichment (SELEX) and nonequilibrium capillary electrophoresis of equilibrium mixtures (NECEEM). However, these stand-alone techniques require multiple rounds of selection and produce a limited number of each unique aptamer. SELEX has the added disadvantage of heavy resource …
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Fundamental Capillary Electrophoresis: An Evaluation of Electrokinetic Sampling
<p>Capillary electrophoresis has become a powerful separation technique in fields of biochemical separations, inorganic ions, and chiral separations. The technique has experienced exponential growth since the historic publication of Zone Electrophoresis in Open-Tubular Glass Capillaries by Lukacs …
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THE DETERMINATION OF TRACE METALS BY CAPILLARY ELECTROPHORESIS
The development of a capillary electrophoresis (CE) method for the determination of inorganic and organo mercury species as their dithizone sulphonate (DzS) complexes using coated capillary columns is described. The complexes were pre-formed before injection and detection was by direct measurement …
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Core-based hyperbranched polyethyleneimine coating in capillary electrophoresis
In capillary electrophoresis (CE), chemical and dynamic modification of a fused silica surface can be used to control the electroosmotic flow (EOF), to minimize the interaction of analytes with the capillary surface and to modify the selectivity. , core-based hyperbranched polyethyleneimine (CHPEI) …
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Further investigation of capillary electrophoresis for pharmaceutical analysis
… disadvantages. In this context the potential of capillary electrophoresis (CE) is established through a study of the current literature. Capillary electrophoresis method is developed and optimised for alkylxanthines. The achieved separation for these analytes stands out for its high efficiency …
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Peptide Analysis Using Capillary Electrophoresis With Fluorescence Detection
Since the amino acids tryptophan, tyrosine and phenylalanine contain aromatic functionalities, they can be detected without derivatization when the proper ultraviolet excitation wavelengths are used. The application of wavelength-resolved CE-LIF for the native fluorescence detection of these amino …
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Analysis of non-classical neurotransmitters using capillary electrophoresis
Capillary electrophoresis (CE) is a powerful tool for the analysis of complex microenvironments and has found widespread applicability to studies in neuroscience. Depending upon the selectivity and sensitivity requirements of the particular application, a variety of detection schemes for CE are …
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Development of radionuclide detectors for use in capillary electrophoresis
… of two radionuclide detection methods for capillary electrophoresis (CE) is described. The methods are used to determine the neuropeptide content of single neurons. The application of CE to single cell studies by several research groups is also reviewed with an emphasis on the variety of …
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Microchip Liquid Chromatography and Capillary Electrophoresis Separations in Multilayer Microdevices
… liquid chromatography systems and multilayer capillary electrophoresis microdevices with crossover channels were fabricated using various substrates such as poly(dimethylsiloxane) (PDMS), glass, and poly(methyl methacrylate) (PMMA). I have demonstrated pressure-driven pumping of liquids in …
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Capillary Electrophoresis of Proteins with Selective On-line Affinity Monoliths
… analysis of proteins in biological fluids by capillary electrophoresis (CE) is of interest in clinical chemistry. However, due to low analyte concentrations and poor concentration limits of detection (CLOD), protein analysis by this technique is frequently challenging. Coupling …
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Peroxyoxalate chemiluminescence and capillary electrophoresis : new methods for bioanalytical chemistry
… is provided by a chemical reaction and 2) Capillary electrophoresis-a separation technique in which small ions as well as large biomolecules can be separated with high efficiency within a narrow capillary under the influence of high voltage.</p>
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Capillary electrophoresis with wavelength-resolved fluorescence for analysis of peptides
Wavelength-resolved fluorescence detection in capillary electrophoresis yields a powerful analytical tool for analysis of complex micro-environments. The design, development, and applications of wavelength-resolved fluorescence detection for capillary electrophoresis are reviewed.
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THE ANALYSIS OF CHEMICALS AND BIOCHEMICALS BY HIGH PERFORMANCE CAPILLARY ELECTROPHORESIS
… methods based on the use of high performance capillary electrophoresis (HPCE) were developed for chemical and biochemical applications. Analyses of selected groups of compounds including antibiotics, steroids and plant growth regulators were performed. Optimum conditions for the separations …
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