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Search results for: supported liquid membrane
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Application of multicriteria decision analysis in solvent type optimization for chlorophenols determination with a dispersive liquid–liquid microextraction
PublicationThis study presents a novel support tool for the optimization and development of analytical methods. The tool is based on multi-criteria decision analysis (MCDA), namely the Technique for Order of Preference by Similarity to the Ideal Solution (TOPSIS), that allows users to rank possible solutions according to their requirements. In this study, we performed rankings of pairs of eight extraction and three dispersive solvents used...
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DISPERSIVE LIQUID-LIQUID MICROEXTRACTION COUPLED WITH MICRO-VOLUME SPECTROPHOTOMETRY FOR DETERMINATION OF TOTAL IODINE IN URINE SAMPLES
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Comparison of High Performance Liquid Chromatography Methods with Different Detectors for Determination of Steroid Hormones in Aqueous Matrices
PublicationThis paper presents the development and comparison of procedures for the qualitative and quantitative determination of five estrogenic compounds (17-a-ethynylestradiol, estrone, estradiol, estriol, and progesterone) in drinking water and wastewater samples. Five extraction columns and two disks were tested for their efficiency. The C18 columns were superior on the basis of cost for solid phase extraction of drinking water or sewage....
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Facile synthesis and characterization of graphene and N-doped graphene by CVD method from liquid precursors for promising electrode materials
PublicationIn this study, high-quality and few-layered graphene was synthesized using the chemical vapor deposition (CVD) method from liquid sources. Two different liquid carbon sources, pyridine, and benzene, were used and deposited on nickel foam under heat conditions using a bubbler in a quartz tube. X-ray diffraction (XRD) and Raman analysis confirmed the crystalline properties of graphene and N-doped graphene, demonstrating the high...
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Dipodal Tetraamide Derivatives of 1,10-Diaza-18-Crown-6 and Alkylmalonic Acids—Synthesis and Use as Ionophores in Ion Selective Membrane Electrodes
PublicationNovel dipodal derivatives of an 18-membered diaza-crown ether with two diamide chains featuring methylmalonic or butylmalonic acid residues were obtained and tested as ionophores in ion-selective plasticized membrane electrodes. The objective of the study was to identify measurement conditions which ensure the most favorable performance for magnesium ion-selective electrodes. The relationship between the molar lipophilic anion...
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Fast, sensitive and reliable multi-residue method for routine determination of 34 pesticides from various chemical groups in water samples by using dispersive liquid – liquid microextraction coupled with gas chromatography – mass spectrometry
PublicationA simple and efficient dispersive liquid-liquid microextraction technique (DLLME) was developed by using a mixture of two solvents: 40 μL of tetrachlorethylene (extraction solvent) and 1.0 mL of methanol (disperser solvent), which was rapidly injected with a syringe into 10mL ofwater sample. Some important parameters affecting the extraction efficiency, such as type and volume of solvents, water sample volume, extraction time,...
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A research on the optimal conditions for separation and identyfication of the components from the Droseraceae extracts by column liquid chromatography
PublicationThe isolation of the components with anticipated biological properties i.e. antimicrobial, fungicidal, antioxidant and perhaps anticancer activity is for many years a one of the biggest issues of modern separation science. Their obtaining based on the isolation of the components with the biological activity from in vitro cultured plants by extraction techniques is often more difficult than their production by the chemical synthesis.The...
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Application of deep eutectic solvents in analytical sample pretreatment (update 2017–2022). Part A: Liquid phase microextraction
PublicationSustainable development in all branches of human activity has become an unequivocal necessity in the last two decades, and green chemistry goes hand in hand with it. Various ways have been proposed in analytical chemistry to meet the current requirements of green chemistry. One such approach is the research of new reagents and solvents for analytical purposes. Deep eutectic solvents (DESs) began being investigated and used in analytical...
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The effect of metal cluster deposition route on structure and photocatalytic activity of mono- and bimetallic nanoparticles supported on TiO2 by radiolytic method
PublicationTiO2 (P25) was modified with small and relatively monodisperse mono- and bimetallic clusters (Ag, Pd, Pt, Ag/Pd, Ag/Pt and Pd/Pt) induced by radiolysis to improve its photocatalytic activity. The as-prepared samples were characterized by X-ray fluorescence spectrometry (XRF), photoluminescence spectrometry (PL), diffuse reflectance spectroscopy (DRS), X-ray powder diffractometry (XRD), scanning transition electron microscopy (STEM)...
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Modelling of vibrations of a liquid filled tank
PublicationPrzeprowadzono analizę teoretyczną i numeryczną zbiorników długich i krótkich wypełnionych całkowicie lub częściowo cieczą. Wyznaczenie obciążeń hydrodynamicznych dotyczy bezpośrednio wytrzymałości konstrukcji samego zbiornika, a przez to pozwala określić wytrzymałość konstrukcyjną całego kadłuba. Szczególne wymagania stawiane są zbiornikom do przewozu cieczy radioaktywnych, gdyż należy zapewnić bardzo wysoki stopień bezpieczeństwa...
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Multicomponent ionic liquid CMC prediction
PublicationWe created a model to predict CMC of ILs based on 704 experimental values published in 43 publications since 2000. Our model was able to predict CMC of variety of ILs in binary or ternary system in a presence of salt or alcohol. The molecular volume of IL (Vm), solvent-accessible surface (Sˆ), solvation enthalpy (DsolvGN), concentration of salt (Cs) or alcohol (Ca) and their molecular volumes (Vms and Vma, respectively) were chosen...
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Liquid crystal thermography experimental application
PublicationPraca przedstawia wykorzystanie termografii ciekłokrystalicznej do badania zjawisk wymiany ciepła z zastosowaniem metod stanu ustalonego i przejściowej.
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Liquid Crystals in Analytical Chemistry: A Review
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Hydrodynamics of tank partially filled with liquid.
PublicationW artykule podano podstawowe równania dynamiki zbiornika wypełnionego częściowo cieczą. Na modelu tego zbiornika przeprowadzono badania eksperymentalne i wyniki tych badań przedstawiono jako efekt końcowy.
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Effect of Laminar Pulsatile Fluid Flow on Separation of Volatile Organic Compounds from Aqueous Solution by a Hollow Fiber Membrane-Based Process
PublicationIn this study, a laminar pulsatile fluid flow was used for the separation of benzene, toluene, ethylbenzene, and xylene isomers (BTEX) from aqueous solutions. Polyether sulfone hollow fiber membrane has been applied to this process. The effects of BTEX concentration, and feed and extraction flow rates were examined. It was found that the application of the pulsatile fluid flow with...
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Removal of ketoprofen from surface water in a submerged photocatalytic membrane reactor utilizing membrane distillation: effect of process parameters and evaluation of long‐term performance
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Amperometric gas sensors with elektrodes chemically deposited on Nafion membrane
PublicationW pracy przedstawiono opis metod otrzymywania elektrod pracujących w czujnikach amperometrycznych gazów z elektrolitem ciekłym. Zaprezentowano metody chemiczne takie jak: metoda impregnacji-redukcji i metoda Takenaka-Torikai. Przedstawiono przegląd konstrukcji czujnikowych gazowych z elektrodami tego typu.
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Fibre Bragg Grating pressure transducer using a profiled membrane.
PublicationW pracy przedstawiono nowatorską konstrukcję podwodnego światłowodowego przetwornika ciśnienia, w którym elementem czujnikowym jest światłowodowa siatka Bragga. W omawianym przetworniku siatka Bragga jest zapisana w światłowodzie domieszkowanym pierwiastkami ziem rzadkich i pracuje jako pompowany optycznie laser z rozłożonym sprzężeniem zwrotnym. Dzięki zastosowaniu profilowanej membrany uzyskuje się jednorodny rozkład naprężeń...
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Application of programs ''Robot Millenium'' and MSC.Marc for membrane structures analysis.
PublicationCelem pracy jest weryfikacja obliczeń numerycznych przykryć wiszących dostępnymi na rynku programami komercyjnymi ''Robot Millenium'' i ''MSC.Marc'' W publikacji ograniczono się do analizy statycznej z uwzględnieniem nieliniowości geometrycznej i izotropowego prawa konstytutywnego.
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Membrane processes used for separation of effluents from wire productions
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The effect of unfavourable process conditions on the water desalination by membrane distillation
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Environmental fracture of polypropylene membranes used in membrane distillation process
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The Application of Open Capillary Modules for Sweeping Gas Membrane Distillation
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Separation of effluents from regeneration of a cation exchanger by membrane distillation
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The influence of salt in solutions on hydrochloric acid recovery by membrane distillation
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Effect of flow-rate on ethanol separation in membrane distillation process
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Wettability Studies of Capillary PTFE Membranes Applied for Membrane Distillation
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Wettability of polypropylene capillary membranes during the membrane distillation process
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Separation of volatile compounds from fermentation broth by membrane distillation
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Molecular Dynamics of a Vasopressin V2 Receptor in a Phospholipid Bilayer Membrane
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Membrane structure and interactions of peptide hormones with model lipid bilayers
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Lower Temperature Dehydrogenation of Methylcyclohexane by Membrane-assisted Equilibrium Shift
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Kinetic Description of the Membrane–Solution Interface for Ion-Selective Electrodes
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Morphological Alterations in the Tympanic Membrane Affected by Tympanosclerosis: Ultrastructural Study
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Influence of aprotic solvent on selectivity of an amperometric sensor with nafion membrane
PublicationW publikacji przedstawiono rezultaty badań dotyczące selektywności amperometrycznego czujnika ditlenku siarki z membraną nafionową wobec tlenku węgla i dwutlenku azotu jako interferentów. Zostały porównane współczynniki selektywności dla czujników wypełnionych roztworami elektrolitów zawierających wodne roztwory kwasu siarkowego i różne ilości rozpuszczalnika aprotycznego - dimetylosulfotlenku.
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Influence of aprotic solvent on a signal of an amperometric sensor with Nafion membrane
PublicationW pracy przedstawiono wyniki badań charakterystyk analitycznych amperometrycznego czujnika ditlenku siarki wyposażonego w mebranę nafionową i wypełnionego roztworami elektrolitów o różnej zawartości dimetylosulfotlenku. Ocenie poddany został wpływ zawartości DMSO w roztworze elektrolitu wewnętrznego czujnika oraz prędkości przepływu gazu na czułość czujnika i czas odpowiedzi na zmiany stężenia ditlenku siarki.
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Molecular modelling of membrane sterols with the use of the GROMOS 96 forcefield
PublicationPodstawowym zadaniem tego projektu było udowodnienie zasadności stosowania pola siłowego GROMOS 96 do symulacji steroli błonowych metodą dynamiki molekularnej. Uzyskane wyniki jasno wskazują, że to pole siłowe bardzo dobrze nadaje się do symulacji silnie lipofilowych układów.
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Application of Dispersive Liquid-Liquid Microextraction in Narrow-Bore Tube for Preconcentration and Spectrophotometric Determination of Cadmium in Aqueous Samples
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Size Exclusion Coupled to Reversed Phase Liquid Chromatography for the Characterization of Cranberry Products
PublicationA combination of solvent extraction, size exclusion purification, and reversed-phase liquid chromatography with UV absorption and fluorescence detection was here used for the determination of flavan-3-ols and related oligomeric compounds in cranberry products. The method relied on robust, simple, and inexpensive instrumental equipment present in most of routine analytical laboratories. Sample extracts in methanol/water/hydrochloric...
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High-performance anode-supported solid oxide fuel cells with co-fired Sm0.2Ce0.8O2-δ/La0.8Sr0.2Ga0.8Mg0.2O3−δ/Sm0.2Ce0.8O2-δ sandwiched electrolyte
PublicationIn this study, intermediate-temperature solid oxide fuel cells (IT-SOFCs) with a nine-layer structure are constructed via a simple method based on the cost-effective tape casting-screen printing-co-firing process with the structure composed of a NiO-based four-layer anode, a Sm0.2Ce0·8O2-δ(SDC)/La0·8Sr0.2Ga0.8Mg0·2O3−δ (LSGM)/SDC tri-layer electrolyte, and an La0·6Sr0·4Co0·2Fe0·8O3-δ (LSCF)-based bi-layer cathode. The resultant...
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An integral-differential method for impedance determination of the hydrogen oxidation process in the presence of carbon monoxide in the proton exchange membrane fuel cell
PublicationThe impedance of a proton exchange membrane fuel cell powered by hydrogen contaminated with carbon monoxide, ranging from 150 to 300 ppb, is measured and discussed. The tested range of CO concentration complied with the fuel standard specified in the ISO standards. Studies of influence of CO contamination on operation of PEMFC are crucial for further development and commercialization of fuel cells for automotive applications. Based...
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Natural radioactivity of solid and liquid phases from shale oil and gas prospection in Pomerania
PublicationIonizing radiation intensity data and estimation of equivalent absorbed dose from solid and liquid samples from prospection of shale gas and oil at selected sites in Pomerania are presented. Naturally occurring radioactive materials (NORM) are associated with geological formations or fluids and can be enhanced during oil and gas production. They appear in e.g. drilling cuttings, flow back water, produced water, scale and sludge....
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Direct injection liquid chromatography-mass spectrometry (DI-LC-MS) analysis for rapid lipidomic profiling of extracellular vesicles
PublicationExtracellular vesicles (EVs) are small, spherical particles produced by eukaryotic and prokaryotic cells, surrounded by a bilayer membrane and carrying various bioactive molecules, such as proteins, surface receptors, membrane and soluble proteins, lipids, and nucleic acids. EVs are of substantial interest because of their important roles in cell communication, epigenetic regulation and possible application in disease diagnosis...
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Stainless steel/yttria stabilized zirconia composite supported solid oxide fuel cell
PublicationW tym artykule opisano wytworzenie i przebadanie kompozytowych elementów nośnych tlenkowych ogniw paliwowych. Podłoża nośne zostały wytworzone ze stali nierdzewnej i tlenkiem itru stabilizowanego tlenku cyrkonu (YSZ), których proszki zmieszano w różnych proporcjach objętościowych. Zachowanie podłoży podczas spiekania (skurcz liniowy, porowatość) oraz wysokotemperaturowe właściwości (odporność na utlenianie, przewodność elektryczna)...
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The effect of calcination temperature on structure and photocatalytic properties of Au/Pd nanoparticles supported on TiO2
PublicationBimetallic nanoparticles, composed of two different metal elements, can exhibit peculiar electronic, optical, and catalytic or photocatalytic properties that are absent in the corresponding monometallic nanoparticles. We show the effect of calcination temperature (from 350 to 700°C) on the structure and the photocatalytic properties of Au/Pd-modified TiO2. The composition of the bimetallic Au/Pd nanoparticles in relation to their...
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Quantitative fluorescent determination of DNA – Ochratoxin a interactions supported by nitrogen-vacancy rich nanodiamonds
PublicationOchratoxin A (OTA) is a hazardous contaminant of a large variety of plant and animal originated food. Herein, we report an interaction of OTA with calf thymus DNA (ct DNA) on the nanodiamond surface. We employed multispectroscopic techniques to elucidate the binding mechanism of OTA with ct DNA. The fluorescence and UV–Vis spectroscopy results show that OTA binds to ds ct DNA and forms complexes. We obtained the binding constants...
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Study on the Positioning Accuracy of the GNSS/INS System Supported by the RTK Receiver for Railway Measurements
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Application of TiO2 Supported on Nickel Foam for Limitation of NOx in the Air via Photocatalytic Processes
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Fabrication of solid oxide fuel cell supported on speciallyperformed ferrite-based perovskite cathode
PublicationW pracy przedstawiono warunki technologiczne niezbedne do wytworzenia tlenkowego ogniwa paliwowego na elencie nośnym z materiału perowskitowego LSF. Jako elektrolit stosowana była ceramika z tlenku ceru. Między innymi badany były właściwości elektryczne zarówno materiału katodowego jak i ogniwa.
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Test-supported numerical analysis for evaluation of the load capacity of thin-walled corrugated profiles
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