We are introducing a computer implementation of the mathematical model of zone electrophoresis (CZE) described in Stedry, M., Jaros, M., Hruska, V., Gas, B., Electrophoresis 2004, 25, 3071-3079 program PeakMaster. The computer model calculates eigenmobilities, which are the eigenvalues of the matrix tied to the linearized continuity equations, and which are responsible for the presence of system eigenzones (system zones, system peaks). The model also calculates other parameters of the background electrolyte (BGE)-pH, conductivity, buffer capacity, ionic strength, etc., and parameters of the separated analytes--effective mobility, transfer ratio, molar conductivity detection response, and relative velocity slope. This allows the assessment of the indirect detection, conductivity detection and peak broadening (peak distortion) due to electromigration dispersion. The computer model requires the input of the BGE composition, the list of analytes to be separated, and the system instrumental configuration. The output parameters of the model are directly comparable with experiments; the model also simulates electropherograms in a user-friendly way. We demonstrate a successful application of PeakMaster for inspection of BGEs having no stationary injection zone.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/elps.200405982 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterization of extracellular vesicles by capillary zone electrophoresis: A novel concept for characterization of a next-generation drug delivery platform.
J Pharm Anal
December 2024
Department of Toxicology, Faculty of Pharmacy, Medical University of Gdansk, 80-416 Gdansk, Poland.
Extracellular vesicles (EVs) are a part of a cell-to-cell communication system of prokaryotic and eukaryotic organisms. Their ability to penetrate biological barriers and to transfer molecules between cells shows their potential as a novel class of drug delivery platform. However, because of the great heterogeneity of EVs and the complexity of biological matrices from which they are typically isolated, reliable quality control procedures need to be established to ensure their safety for medical use.
View Article and Find Full Text PDFComputer Simulation of Sulfated Cyclodextrin-Based Enantioselective Separation of Weak Bases With Partial, High-Concentration Filling of the Chiral Selector and Analyte Detection on the Cathodic Side.
Electrophoresis
January 2025
Institute for Infectious Diseases, University of Bern, Bern, Switzerland.
Computer simulation was utilized to characterize the electrophoretic processes occurring during the enantioselective capillary electrophoresis-mass spectrometry (CE-MS) analysis of ketamine, norketamine, and hydroxynorketamine in a system with partial filling of the capillary with 19 mM (equals 5%) of highly sulfated γ-cyclodextrin (HS-γ-CD) and analyte detection on the cathodic side. Provided that the sample is applied without or with a small amount of the chiral selector, analytes become quickly focused and separated in the thereby formed HS-γ-CD gradient at the cathodic end of the sample compartment. This gradient broadens with time, remains stationary, and gradually reduces its span from the lower side due to diffusion such that analytes with high affinity to the anionic selector become released onto the other side of the focusing gradient where anionic migration and defocusing occur concomitantly.
View Article and Find Full Text PDFCapillary electrophoresis separations with Betaine:Urea, a deep eutectic solvent as the separation medium.
Anal Chim Acta
January 2025
School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China. Electronic address:
Background: Capillary electrophoresis (CE) is a highly versatile separation technique widely used in analytical chemistry. Traditionally, CE can be categorized as either aqueous or non-aqueous systems based on the buffer solvents employed. For decades, non-aqueous CE has been predominantly associated with the use of organic solvents, a perception deeply ingrained in the scientific community.
View Article and Find Full Text PDFImaged capillary isoelectric focusing and online mass spectrometry for milk whey protein characterization in dairy products.
Anal Biochem
January 2025
Advanced Electrophoresis Solutions Ltd., 380 Jamieson Parkway, Unit 7 and 8, ON, N3C 4N4, Canada; AES Biotech Jiaxing Ltd., No. 501 South Changsheng Road, Economic and Technological Development Zone, Jiaxing City, Zhejiang Province, PR China. Electronic address:
Characterizing major bovine milk proteins, including whey and casein, is of significant interest in the dairy industry. The diverse array of protein proteoforms can be different in terms of genetic variation, breed ways, lactation stage, and animal nutritional status. Current routine methods for bovine milk protein profiling are typically based on immunological techniques, infrared spectroscopy, slab gel isoelectric focusing, capillary electrophoresis, and high-performance liquid chromatography.
View Article and Find Full Text PDFLongitudinal Metabolomics Reveals Metabolic Dysregulation Dynamics in Patients with Severe COVID-19.
Metabolites
November 2024
Department of Intensive Care Medicine, Institute of Science Tokyo, 1-5-45 Yushima, Bunkyo City 113-8510, Japan.
A dysregulated metabolism has been studied as a key aspect of the COVID-19 pathophysiology, but its longitudinal progression in severe cases remains unclear. In this study, we aimed to investigate metabolic dysregulation over time in patients with severe COVID-19 requiring mechanical ventilation (MV). In this single-center, prospective, observational study, we obtained 236 serum samples from 118 adult patients on MV in an ICU.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!