Capillary Electrophoresis Separation
Mostrando 1-12 de 74 artigos, teses e dissertações.
-
1. A Simple Approach to Analyze Sugar Nectar Composition in Flowers Using Capillary Electrophoresis and Enzymatic Assays
Despite the obvious importance of nectar, the composition of this solution remains surprisingly understudied to most of the flowers. Here we describe a simple, low-cost, and reliable methodology to analyze the three main sugars present in 210 nectar samples of Christmas Bellflowers using capillary electrophoresis (CE) and enzymatic assays. CE separation (-16
J. Braz. Chem. Soc.. Publicado em: 2020-10
-
2. Development of a generic method for the determination of proton-pump inhibitors by capillary zoneelectrophoresis
A generic capillary zone electrophoresis method was developed for the analysis of four proton pump inhibitors: omeprazole, pantoprazole, lansoprazole and rabeprazole. During preliminary analysis screening of phosphate buffers at different pH levels was performed, in order to determine the optimum pH domain suitable for the simultaneous determination of all s
Braz. J. Pharm. Sci.. Publicado em: 30/09/2019
-
3. A NEW VALIDATED METHOD FOR DETERMINATION OF ROFLUMILAST IN TABLET BY CZE-UV
This paper reports a new and validated capillary electrophoresis method to determine Roflumilast (RFL) with an internal standard in tablet. The separation was made on an uncoated fused-silica capillary column 50 cm effective length and 75 µm i.d. 20 mmol L-1 of Na2B4O7 buffer including 15% (v/v) methanol (pH=9.5) was used as background electrolyte. A potent
Quím. Nova. Publicado em: 18/07/2019
-
4. Determination of Short Chain Fatty Acids in Mice Feces by Capillary Electrophoresis
Short-chain fatty acids (SCFA) are compounds produced during fermentation of gut microbiota. Acetic, propionic and butyric acids are the most important SCFA produced from non-digestible foods. We developed and validated a rapid and low-cost capillary electrophoretic (CE) method for determination of acetic, propionic and butyric acids in mice feces (100 mg of
J. Braz. Chem. Soc.. Publicado em: 23/05/2019
-
5. Stability-indicating capillary zone electrophoresis assay for the analysis of linezolid in tablets
A simple and fast alternative methodology using capillary zone electrophoresis (CZE) to analyze linezolid and its cationic photodegradation products in tablets has been developed. The separation was carried out on fused silica capillary and conducted using 100 mM formic acid (pH 3.0) and by applying 30 KV voltage. Detection was performed at UV 254 nm. The op
Braz. J. Pharm. Sci.. Publicado em: 08/04/2019
-
6. A Systematic Procedure to Develop a Capillary Electrophoresis Method Using a Minimal Experimental Data
The choice of an appropriate background electrolyte (BGE) and its components for capillary electrophoresis analysis is the main step in capillary electrophoresis method development. The use of an inadequate co-ion component could lead to asymmetrical peaks and selecting an inappropriate counter-ion could affect the buffer capacity and the pH of the BGE, lead
J. Braz. Chem. Soc.. Publicado em: 2016-11
-
7. Chromophoreasy, an Excel-Based Program for Detection and Integration of Peaks from Chromatographic and Electromigration Techniques
This paper describes the development, evaluation, features and applications of Chromophoreasy, an alternative Excel-based program for recognition and integration of chromatographic and electrophoretic peaks. The proposed recognition is made according to parameters adjustable by the analyst, such as time range, noise smoothing window size and slope/curvature
J. Braz. Chem. Soc.. Publicado em: 2016-10
-
8. Enantiomeric Separation of Sibutramine by Capillary Zone Electrophoresis
The chiral separation of sibutramine enantiomers was resolved succesfully by capillary zone electrophoresis using cyclodextrins (CDs) as chiral selectors. A complex screening of several different native and derivatized, neutral and ionized cyclodextrine derivatives was performed. The effects of buffer type, concentration and pH, cyclodextrin type and concent
J. Braz. Chem. Soc.. Publicado em: 2016-06
-
9. Coupling DLLME-CE for the Stereoselective Analysis of Venlafaxine and Its Main Metabolites after Biotransformation by Fungi
Fungal biotransformations have become very important in the study of chiral drugs because the reactions performed by these microorganisms may be enantioselective. However, analyses of analytes present in liquid culture medium have proved to be very difficult due to the complexity of this matrix. The aim of this work was to couple dispersive liquid-liquid mic
J. Braz. Chem. Soc.. Publicado em: 2015-09
-
10. FUNDAMENTOS DE ELETROFORESE CAPILAR: UMA ABORDAGEM POR ANIMAÇÕES
Among the analytical separation techniques, capillary electrophoresis (CE) has attracted attention in both academic and industrial fields, mainly owing to its efficiency, short analysis times, low reagent consumption and residue generation. This is also the case in Chemistry courses, books and papers, demonstrating CE´s well-established status. However,
Quím. Nova. Publicado em: 2015-06
-
11. Automation of an analysis system with microvolume porous membrane sampling, capillary electrophoresis separation and contactless conductivity detection for near-real-time monitoring of traces of low-molecular-weight carboxylic acids in air
Um sistema automatizado de análise foi projetado pelo acoplamento de microamostrador difusional baseado em uma membrana capilar microporosa (CMDS) com a separação por eletroforese capilar (CE) e detecção condutométrica sem contato (C4D). O volume interno do CMDS, da ordem de 30 µL, combinado com a demanda de nanolitros dos equipamentos de CE-C4D, levo
Journal of the Brazilian Chemical Society. Publicado em: 2011-11
-
12. A eletroforese capilar para a separação das metalotioneínas da cianobactéria (Synechococcus PCC 7942) e de mamíferos / Capillary electrophoresis for the separation of cyanobacterial metallothionein (Synechococcus PCC 7942) and mammals
Metallothioneins (MTs) are low molecular weight proteins, which main functions are the regulation of metals levels in the body and detoxification. The capillary electrophoresis (CE) characterization of MT from Synechococcus cyanobacteria was attained by comparison with commercial standards of horse kidney and rabbit liver MTs. The influence of electrolyte, s
Publicado em: 2011