This article presents an overview of the design and application of coupled SPE–CE systems that have been reported in the literature between January 2011 and June 2013. The present paper is an update ...of three previous review papers covering the years 2000–2011 (Electrophoresis 2008, 29, 108–128; Electrophoresis 2010, 31, 44–54; Electrophoresis 2012, 33, 243–250). The use of in‐line and on‐line SPE–CE approaches is described in this review. Emerging technological developments, such as the use of in‐line frit‐free SPE and chip‐based SPE for extraction of sample components prior to CE analysis, are outlined. Selected examples illustrate the applicability of SPE–CE in biomedical, pharmaceutical, and environmental analysis. A complete overview of recent SPE–CE studies is given in table format, providing information on sample type, SPE sorbent, coupling mode, detection mode, and LOD. Finally, some general conclusions and future perspectives are provided.
"Saturn" remains in orbit Glushechenko E. N.; Chmil V. M.
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature,
05/2013
2-3
Journal Article
Recenzirano
Odprti dostop
The article is dedicated to scientific and production enterprise "Saturn" — since its foundation up to the present day. The authors describe the determining stages of its development and its team’s ...scientific and technological achievements over the 45-year history of the enterprise.
An overview of the design and application of coupled solid‐phase extraction‐capillary electrophoresis (SPE‐CE) systems reported in the literature between July 2013 and June 2015 is provided in this ...paper. The present article is a continuation of our previous review papers on this topic which covered the time period 2000–2013 (Electrophoresis 2008, 29, 108–128; Electrophoresis 2010, 31, 44–54; Electrophoresis 2012, 33, 243–250; Electrophoresis 2014, 35, 128–137). The use of in‐line and on‐line SPE‐CE approaches is treated and outlined in this review. Recent advancements, such as, for example, the use of aptamers as affinity material for in‐line SPE‐CE, the use of a bead string design for in‐line fritless SPE‐CE, and new interfacing techniques for the on‐line coupling of SPE to CE, are outlined. Selected examples demonstrate the applicability of the coupled SPE‐CE systems for biomedical, pharmaceutical, environmental, and food studies. A complete overview of the recent SPE‐CE studies is given in table format, providing information on sample type, SPE sorbent, coupling mode, detection mode, and LOD. Finally, some general conclusions and perspectives are provided.
Molecular imprinting-based solid-phase extraction (MI-SPE) has been in the spotlight to improve the recognition selectivity and detection sensitivity. MI-SPE provides a powerful tool for ...chemo/bioanalysis in complex matrices and meanwhile, benefits from distinguished advantages such as easy operation, high throughput, low cost, high selectivity and durability. This review proposed the recent advances in molecular imprinting concerning novel preparation strategies of molecularly imprinted polymers (MIPs) and typical applications of MI-SPE. Preparation strategies are highlighted by dividing into ten sections mainly including dummy imprinting, multi-template imprinting, surface imprinting, water-compatible imprinting, restricted access material combining imprinting etc.; each section provides the descriptions about what restrictions led to the emergence of any strategy, strengths/weaknesses of every strategy and universal applications of upgraded MIPs in various SPE modes prior to chromatographic analysis. The potential of MIPs for implementation in routine laboratory activities and scale-up is expected, and finally remaining challenges and future perspectives are proposed.
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•Current challenges on MIPs and related imprinting strategies are comprehensively summarized.•Applications of upgraded molecular imprinting based solid-phase extraction are discussed.•The potential of MIPs for implementation in routine laboratory activities and scale-up is summarized.•The future study requirements are highlighted.
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•Development of radionuclide-selective solid-phase extraction (SPE) materials.•Operating mechanism of proprietary SPE products in radionuclide separation.•Application of proprietary ...SPE products for separation of radionuclides.
Precise and rapid determination of radionuclides (RNs) in the environment is essential for environmental monitoring, radiological protection, and radioactive waste management due to the increasing use of nuclear energy globally, as well as the unprecedented release of RNs after nuclear accidents, e.g., Chornobyl, Fukushima. In this regard, sample preparation, which is an error-prone step in RN analysis, needs more attention to improve selectivity and sensitivity of analytical measurements by sample clean-up or pre-concentration. Solid-phase extraction (SPE) is an effective sample preparation technique capable of selectively separating target RNs from other matrix ions in environmental samples. Commercially available proprietary SPE products, packaged in columns, cartridges, or disk formats, have been widely used for sample purification in RN analysis. They have high affinity and selectivity for target RNs, and their reusability and ease of large-scale production make them more economical than other options. Since there have not been any reviews regarding selective separation of RNs using proprietary SPE products, this work reviews approaches that have been adopted for isolation of RNs (Cs, Sr, Tc, Th, U, Np, Pu, Am, and Cm) from environmental matrices. The review assumably provides information on selecting macro-SPE-assisted sample preparation techniques to separate and analyze RNs in environmental matrices.
•MIP-SPE method was developed for the determination of organophosphorus pesticides.•Crucial MIP-SPE parameters were optimized to select optimum conditions.•Fruit samples were analyzed by using the ...MIP-SPE coupled with GC–MS.•The MIP-SPE showed improved selectivity and recovery compared to C18-SPE.
A new selective material based on molecularly imprinted polymers (MIPs) was prepared and used as solid-phase extraction (SPE) sorbent for sample enrichment of organophosphorus pesticides (OPP) residues prior to high performance liquid chromatography (HPLC). Three OPPs widely used in agriculture (diazinon, quinalphos and chlorpyrifos) were selected as target analytes. Various parameters affecting the extraction efficiency of the imprinted polymers were evaluated to optimize the selective preconcentration of OPPs from water samples. Under the optimized conditions, the developed MIP-SPE method showed excellent linearity in the range of 4–200μgL−1 with coefficient of determination (r2)>0.997 and good OPP recoveries of >91% and limits of detection (LODs) ranging from 0.83μgL−1 to 2.8μgL−1,which is much lower than the maximum residue limits (MRLs) set by the Codex Alimentarius Commission and Japan Food Chemical Research Foundation. The developed method was successfully applied to the analysis of OPPs in selected fruit samples. MIP-SPE showed superior extraction efficiency towards the OPPs as compared to non-imprinted polymer solid-phase extraction (NIP-SPE) and commercial C18-SPE methods.
During the heat treatment of proteinaceous food, heterocyclic aromatic amines (HAAs), a kind of strong mutagens/carcinogens are formed. HAAs can be classified into two major groups based on the ...heating temperature, which are thermic HAAs generally formed in 150 to 300 °C and pyrolytic HAAs produced above 300 °C. This review focuses on the formation mechanisms of HAAs and identifies different mechanisms of the formation of HAAs in foodstuffs. Moreover, an overview of the available extraction, purification methods, and instrumental analytical methods in the last two decades is shown to determine the HAAs in various foodstuffs. Finally, based on the factors that affect the formation of HAAs in heat‐processed foodstuffs, such as the cooking method, food type, the recipe, and the content of substances with enhancing or inhibiting effects on the formation of HAAs, this review also highlights the most promising strategies for mitigating HAAs, which include adjusting cooking methods or process conditions, adding natural product extracts, antioxidants or other compounds, or reasonable selection of types of foodstuff. The review intends to provide a broad but comprehensive understanding of the formation, extraction, purification, analytical methods, and possible mitigation strategies for isolated and identified HAAs.
Our study focuses on enhancing the antioxidant potential of saffron petals extract (SPE) as a sustainable corrosion inhibitor for aluminium (Al) in a 3.5% NaCl solution. The phytochemical screening ...and antioxidant activity are identified. Various investigative methodologies, including experimental techniques such as Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization (PDP), were employed to evaluate the effectiveness of this compound in inhibiting corrosion. Computational analysis, involving Density Functional Theory (DFT) and Molecular Dynamics (MD) simulations, were utilized to carry out a Theoretical study on the main constituents of SPE. The surface characteristics and composition of the corroded Al were examined using a combination of Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDX) and Fourier Transform Infrared Spectroscopy (FT-IR). The Electrochemical results suggest that the effectiveness of the inhibitor was dependent on its concentration, reaching 95.11% at 500 ppm of SPE. The PDP indicates that mixed inhibition control effectively slowed down the corrosion of Al. Furthermore, the adsorption behaviour of SPE onto Al follows to the Langmuir isotherm model. SEM, EDX and FT-IR analyses further verified significant alterations in the surface morphology and roughness of Al and confirming the successful formation of a protective layer on the Al surface. Ultraviolet-Visible spectroscopy (UV-Vis) reveals evidence of interaction between Al and the SPE molecules. Computational studies substantiated these observations, demonstrating the reactivity and adsorption patterns of the evaluated major bioactive molecules of SPE on the Al surface.
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•The experimental results confirmed the inhibition efficiency of SPE.•SPE demonstrated exceptional inhibitory performance over 24 hours of immersion.•SEM and FT-IR confirmed the formation of a protective layer by SPE and Al cations.•MD and DFT offered valuable insights into the adsorption of some SPE's molecules.
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