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Dr. Ewelina Chajduk
Institute of Nuclear Chemistry Technology Dorodna 16 WARSAW, POLAND

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0 ICP-MS
0 Neutron Activation Analysis
0 Inorganic trace analysis
0 Quality of analytical results
0 Certified Reference Materials in Inorganic Trace Analysis

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ICP-MS
Neutron Activation Analysis
Certified Reference Materials in Inorganic Trace Analysis
Inorganic trace analysis

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Journal article
Published: 03 April 2021 in Molecules
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193mPt and 195mPt radionuclides are therapeutically attractive Auger electron emitters with notably high Auger electron yield per decay. The present paper summarizes the first step of research on the applications of core-shell ([email protected]) nanoparticles for electron Auger therapy of HER2+ (human epidermal growth factor receptor 2) breast cancer and hepatocellular carcinoma. Gold nanoparticles (30 nm) were synthesized covered with a platinum shell at high efficiency (>80%) and were further evaluated for in vitro studies such as binding affinity, internalization and cytotoxicity. To find the mechanism(s) responsible for platinum cytotoxicity in HepG2 cells, the platinum concentration in isolated cell nuclei and cytoplasm was determined using ICP-MS (inductively coupled plasma mass spectrometry). Lack of platinum in cell nuclei suggests that the cytotoxic effect is associated with the generation of reactive oxygen species (ROS) and reactive nitrogen species (RNS). Studies carried out on the SKOV-3 cell line with the use of a synthesized targeting bioconjugate ([email protected]) revealed a high affinity of this preparation to HER2+ cells, its internalization, its placement in the perinuclear area and partial intranuclear location. The specific binding for HER2 negative cells, MDA-MB-231, was negligible and [email protected] did not enter these cells. The results obtained are promising and warrant future investigation of Auger electron therapy using 193mPt and 195mPt based radiopharmaceuticals.

ACS Style

Kamil Wawrowicz; Agnieszka Majkowska-Pilip; Damian Gaweł; Ewelina Chajduk; Tadeusz Pieńkowski; Aleksander Bilewicz. [email protected] Core-Shell Nanoparticle Bioconjugates for the Therapy of HER2+ Breast Cancer and Hepatocellular Carcinoma. Model Studies on the Applicability of 193mPt and 195mPt Radionuclides in Auger Electron Therapy. Molecules 2021, 26, 2051 .

AMA Style

Kamil Wawrowicz, Agnieszka Majkowska-Pilip, Damian Gaweł, Ewelina Chajduk, Tadeusz Pieńkowski, Aleksander Bilewicz. [email protected] Core-Shell Nanoparticle Bioconjugates for the Therapy of HER2+ Breast Cancer and Hepatocellular Carcinoma. Model Studies on the Applicability of 193mPt and 195mPt Radionuclides in Auger Electron Therapy. Molecules. 2021; 26 (7):2051.

Chicago/Turabian Style

Kamil Wawrowicz; Agnieszka Majkowska-Pilip; Damian Gaweł; Ewelina Chajduk; Tadeusz Pieńkowski; Aleksander Bilewicz. 2021. "[email protected] Core-Shell Nanoparticle Bioconjugates for the Therapy of HER2+ Breast Cancer and Hepatocellular Carcinoma. Model Studies on the Applicability of 193mPt and 195mPt Radionuclides in Auger Electron Therapy." Molecules 26, no. 7: 2051.

Journal article
Published: 03 September 2020 in Sustainability
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High temperature gas-cooled reactors have recently gained importance as a source of electricity and process heat. Nuclear fuel used in these reactors consists of TRISO (TRiple coated ISOtropic) coated particles, where spherical grains of UO2 or UC2 or UCO kernel are covered with four successive layers consisting of pyrolytic carbon and silicon carbide. Of great importance is the chemical purity of reagents and substances used for the production of TRISO coated fuel particles. Analytical techniques ensuring the determination of elements at trace levels are inductively coupled plasma mass spectrometry (ICP-MS) and neutron activation analysis (NAA). They were applied in this work for the chemical characterization of substrates used for TRISO fuel production. Two analytical procedures were developed: the first, where materials are analyzed using ICP-MS, and the second with the aid of NAA. Successive stages of these procedures are described with details. Results of quantitative chemical analysis of examined substances are reported as well as detection limits for the investigated elements. Moreover, the expanded uncertainties estimated for the determined elements while employing the devised analytical procedures are presented.

ACS Style

Ewelina Chajduk; Paweł Kalbarczyk; Jakub Dudek; Marta Pyszynska; Anna Bojanowska-Czajka; Zbigniew Samczyński. Development of Analytical Procedures for Chemical Characterization of Substrates for the Production of TRISO Coated Particles as Nuclear Fuel in High Temperature Gas-Cooled Reactors. Sustainability 2020, 12, 7221 .

AMA Style

Ewelina Chajduk, Paweł Kalbarczyk, Jakub Dudek, Marta Pyszynska, Anna Bojanowska-Czajka, Zbigniew Samczyński. Development of Analytical Procedures for Chemical Characterization of Substrates for the Production of TRISO Coated Particles as Nuclear Fuel in High Temperature Gas-Cooled Reactors. Sustainability. 2020; 12 (17):7221.

Chicago/Turabian Style

Ewelina Chajduk; Paweł Kalbarczyk; Jakub Dudek; Marta Pyszynska; Anna Bojanowska-Czajka; Zbigniew Samczyński. 2020. "Development of Analytical Procedures for Chemical Characterization of Substrates for the Production of TRISO Coated Particles as Nuclear Fuel in High Temperature Gas-Cooled Reactors." Sustainability 12, no. 17: 7221.

Journal article
Published: 03 October 2019 in Ceramics International
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This work reports the results of an interdisciplinary study seeking to address the issue of bone tempering in the Funnel Beaker (TRB) culture from the territory that is today Poland. In this paper we contribute to this debate by closely examining the geochemical characteristics (using INAA, ICP-MS, SEM-EDS, γ-ray spectrometry and OM) of six ceramic vessels collected from the archaeological site in Kałdus, northern Poland. Particular emphasis is placed on the need to clarify whether the bones in the pottery from Kałdus were deliberately added or incidentally incorporated in a clay paste. Through exploring the chemical, mineralogical and petrographic composition of ceramics, we also investigate whether different pastes were used contemporarily by potters from Kałdus for different types of wares during the mid-4th millennium BC. The results has allowed us to hypothesise a local provenance of the bone-tempered vase from Kałdus. Furthermore, the TRB potters’ choices to add crushed and burned bones to a clay paste seemed to lack a technological basis. Rather, it appears that a temper made of bones had strong symbolic associations and was most likely ritualised in the working memory of the TRB potters from Kałdus, or even the entire TRB East Group milieu.

ACS Style

Łukasz Kowalski; Piotr Weckwerth; Marek Chabowski; Kamil Adamczak; Paweł Jodłowski; Grażyna Szczepańska; Ewelina Chajduk; Halina Polkowska-Motrenko; Magdalena Kozicka; Stanisław Kukawka. Towards ritualisation: Insights into bone-tempered pottery from the TRB settlement in Kałdus (Poland, 3500–3350 BC). Ceramics International 2019, 46, 3099 -3112.

AMA Style

Łukasz Kowalski, Piotr Weckwerth, Marek Chabowski, Kamil Adamczak, Paweł Jodłowski, Grażyna Szczepańska, Ewelina Chajduk, Halina Polkowska-Motrenko, Magdalena Kozicka, Stanisław Kukawka. Towards ritualisation: Insights into bone-tempered pottery from the TRB settlement in Kałdus (Poland, 3500–3350 BC). Ceramics International. 2019; 46 (3):3099-3112.

Chicago/Turabian Style

Łukasz Kowalski; Piotr Weckwerth; Marek Chabowski; Kamil Adamczak; Paweł Jodłowski; Grażyna Szczepańska; Ewelina Chajduk; Halina Polkowska-Motrenko; Magdalena Kozicka; Stanisław Kukawka. 2019. "Towards ritualisation: Insights into bone-tempered pottery from the TRB settlement in Kałdus (Poland, 3500–3350 BC)." Ceramics International 46, no. 3: 3099-3112.

Journal article
Published: 16 April 2019 in Food Chemistry
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Arsenic and its inorganic species: As (III), As (V), dimethylarsenic acid (DMA) and monomethylarsenic acid (MMA) were determined in hypoallergenic formulas and grain porridges commercially available on Polish market, dedicated for infant 0-8 months. After quantitative extraction with 0.5% HNO3, separation of individual species was performed by high performance liquid chromatography (HPLC), and their determination by neutron activation analysis (NAA) and inductively coupled plasma mass spectrometry (ICP-MS). Due to relatively low content of As in the analysed samples, it was only possible to determine DMA using the HPLC-ICP-MS mode. HPLC separation coupled with off-line determination by NAA enabled the determination of more extracted As species (especially inorganic) with good accuracy. Certified reference material (CRM) Rice Flour SRM 1568b (NIST) was used for the validation of both procedures.

ACS Style

Ewelina Chajduk; Halina Polkowska-Motrenko. The use of HPLC-NAA and HPLC-ICP-MS for the speciation of As in infant food. Food Chemistry 2019, 292, 129 -133.

AMA Style

Ewelina Chajduk, Halina Polkowska-Motrenko. The use of HPLC-NAA and HPLC-ICP-MS for the speciation of As in infant food. Food Chemistry. 2019; 292 ():129-133.

Chicago/Turabian Style

Ewelina Chajduk; Halina Polkowska-Motrenko. 2019. "The use of HPLC-NAA and HPLC-ICP-MS for the speciation of As in infant food." Food Chemistry 292, no. : 129-133.

Article
Published: 30 November 2018 in Journal of Radioanalytical and Nuclear Chemistry
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Graphene oxide (GO) chemically modified with manganese oxide (GO-MnO2) has been used as a sorbent in the radioanalytical determinations. The sorption of selected elements in dependence on pH has been evaluated in batch and column experiments. For the batch technique, the results of the experiments demonstrated that alkali metals were not removed from aqueous solutions over the entire pH range and removal of other elements strongly depends on acidity of the solution. Two examples: determination of Pt and Th in biological materials by radiochemical neutron activation analysis and separation of gamma-ray radionuclides from environmental samples have been described in details.

ACS Style

Ewelina Chajduk; Paweł Kalbarczyk; Halina Polkowska-Motrenko; Leszek Stobiński. Application of modified graphene oxide GO-MnO2 in radiochemical determinations of selected analytes. Journal of Radioanalytical and Nuclear Chemistry 2018, 319, 197 -203.

AMA Style

Ewelina Chajduk, Paweł Kalbarczyk, Halina Polkowska-Motrenko, Leszek Stobiński. Application of modified graphene oxide GO-MnO2 in radiochemical determinations of selected analytes. Journal of Radioanalytical and Nuclear Chemistry. 2018; 319 (1):197-203.

Chicago/Turabian Style

Ewelina Chajduk; Paweł Kalbarczyk; Halina Polkowska-Motrenko; Leszek Stobiński. 2018. "Application of modified graphene oxide GO-MnO2 in radiochemical determinations of selected analytes." Journal of Radioanalytical and Nuclear Chemistry 319, no. 1: 197-203.

Journal article
Published: 25 October 2018 in Scientific Reports
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Iron deficiency (ID) commonly occurs in chronic heart failure (HF) and is associated with poor prognosis. Neither its causes nor pathophysiological significance are clearly understood. We aimed to assess iron status and the effect of iron supplementation in the rat model of post-myocardial infarction (MI) HF. Four weeks after induction of MI to induce HF or sham surgery, rats received intravenous iron (ferric carboxymaltose) or saline, 4 doses in 1-week intervals. HF alone did not cause anemia, systemic or myocardial ID, but reduced myocardial ferritin, suggesting depleted cardiomyocyte iron stores. Iron therapy increased serum Fe, ferritin and transferrin saturation as well as cardiac and hepatic iron content in HF rats, but did not increase myocardial ferritin. This was accompanied by: (1) better preservation of left ventricular (LV) ejection fraction and smaller LV dilation, (2) preservation of function of Ca2+ handling proteins in LV cardiomyocytes and (3) reduced level of inflammatory marker, CRP. Furthermore, iron supplementation did not potentiate oxidative stress or have toxic effects on cardiomyocyte function, but increased activity of antioxidant defenses (cardiac superoxide dismutase). Despite lack of systemic or myocardial ID we found evidence of depleted cardiomyocyte iron stores in the rat model of HF. Furthermore we observed positive effect of iron supplementation and confirmed safety of iron supplementation in this setting.

ACS Style

Aleksandra Paterek; Marta Kępska; Barbara Sochanowicz; Ewelina Chajduk; Joanna Kołodziejczyk; Halina Polkowska-Motrenko; Marcin Kruszewski; Przemysław Leszek; Urszula Mackiewicz; Michał Mączewski. Beneficial effects of intravenous iron therapy in a rat model of heart failure with preserved systemic iron status but depleted intracellular cardiac stores. Scientific Reports 2018, 8, 15758 .

AMA Style

Aleksandra Paterek, Marta Kępska, Barbara Sochanowicz, Ewelina Chajduk, Joanna Kołodziejczyk, Halina Polkowska-Motrenko, Marcin Kruszewski, Przemysław Leszek, Urszula Mackiewicz, Michał Mączewski. Beneficial effects of intravenous iron therapy in a rat model of heart failure with preserved systemic iron status but depleted intracellular cardiac stores. Scientific Reports. 2018; 8 (1):15758.

Chicago/Turabian Style

Aleksandra Paterek; Marta Kępska; Barbara Sochanowicz; Ewelina Chajduk; Joanna Kołodziejczyk; Halina Polkowska-Motrenko; Marcin Kruszewski; Przemysław Leszek; Urszula Mackiewicz; Michał Mączewski. 2018. "Beneficial effects of intravenous iron therapy in a rat model of heart failure with preserved systemic iron status but depleted intracellular cardiac stores." Scientific Reports 8, no. 1: 15758.

Article
Published: 12 June 2018 in Water, Air, & Soil Pollution
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Nanotechnology is a dynamically developing field of scientific and industrial interest across the entire world, and the commercialization of nanoparticles (NPs) is rapidly expanding. Incorporation of nanotechnologies into a range of manufactured goods results in increasing concern regarding the subsequent release of engineered NPs into the environment. One of the biggest threats of using NPs is the transfer and magnification of these particles in the trophic chain. The aim of the studies was the evaluation of the distribution of TiO2 NP contamination in the aquatic ecosystem under laboratory conditions. Bioaccumulation of TiO2 NPs by plants (Elodea canadensis) and fish (Danio rerio) in the source of contamination was investigated. The studies were focused on the consequences of short-term water contamination with TiO2 NPs and the secondary contamination of the components of the investigated model ecosystem (plants, sediments). It was found that in the fish and the plants exposed to NP contamination, the amount of Ti was higher than in the control, indicating an effective bioaccumulation of NPs or ions originating from NPs. It was clearly shown that the NPs present in the sediments are available to plants and fish. Additionally, the aquatic plants, an important trophic level in the food chain, can accumulate NPs and be a source of NPs for higher organisms. It was concluded that even an incidental contamination of water by NPs may result in long-term consequences induced by the release of NPs.

ACS Style

Monika Asztemborska; Małgorzata Jakubiak; Romuald Stęborowski; Ewelina Chajduk; Grażyna Bystrzejewska-Piotrowska. Titanium Dioxide Nanoparticle Circulation in an Aquatic Ecosystem. Water, Air, & Soil Pollution 2018, 229, 1 -9.

AMA Style

Monika Asztemborska, Małgorzata Jakubiak, Romuald Stęborowski, Ewelina Chajduk, Grażyna Bystrzejewska-Piotrowska. Titanium Dioxide Nanoparticle Circulation in an Aquatic Ecosystem. Water, Air, & Soil Pollution. 2018; 229 (6):1-9.

Chicago/Turabian Style

Monika Asztemborska; Małgorzata Jakubiak; Romuald Stęborowski; Ewelina Chajduk; Grażyna Bystrzejewska-Piotrowska. 2018. "Titanium Dioxide Nanoparticle Circulation in an Aquatic Ecosystem." Water, Air, & Soil Pollution 229, no. 6: 1-9.

Article
Published: 21 April 2018 in Biological Trace Element Research
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The aim of this study was to assess the levels of 13 essential and toxic elements (As, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Se, V, Zn) in the infant formulas, available on Polish market. Selected food samples were of animal (cow- and goat-based milks) and plant (soy-based milk, hypoallergic products, grain porridges) origin. Two analytical techniques, inductively coupled plasma mass spectrometry (ICP-MS) and neutron activation analysis (NAA), have been complementarily applied to analyze elemental content of 16 formulas dedicated for infants between 0 and 8 months. For arsenic determinations, the radiochemical mode of NAA was also used. The daily intake of some micronutrients in the age 0–8 months for non-breastfed infants was estimated and compared with present safety limits. Certified reference materials (CRMs) have been used for the validation of the methods: Non-fat Milk Powder 1549 (National Bureau of Standards—NBS), Soya Bean Flour INCT-SBF-4 (Institute of Nuclear Chemistry and Technology—INCT), Rice Flour SRM 1568b (National Institute of Standards and Technology—NIST).

ACS Style

Ewelina Chajduk; Marta Pyszynska; Halina Polkowska-Motrenko. Determination of Trace Elements in Infant Formulas Available on Polish Market. Biological Trace Element Research 2018, 186, 589 -596.

AMA Style

Ewelina Chajduk, Marta Pyszynska, Halina Polkowska-Motrenko. Determination of Trace Elements in Infant Formulas Available on Polish Market. Biological Trace Element Research. 2018; 186 (2):589-596.

Chicago/Turabian Style

Ewelina Chajduk; Marta Pyszynska; Halina Polkowska-Motrenko. 2018. "Determination of Trace Elements in Infant Formulas Available on Polish Market." Biological Trace Element Research 186, no. 2: 589-596.

Journal article
Published: 26 September 2017 in Nukleonika
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The article describes studies on the separation of uranium from acid pregnant leach solutions obtained from Polish uranium ores: dictyonema shales and sandstone rocks. Ion exchange chromatography was applied for uranium sorption, using commercially available, strongly basic anion exchanger, Dowex 1. In model experiments, the influence of degree of crosslinking of Dowex 1 on the efficiency of uranium extraction was investigated. The effect of H2SO4 concentration on the breakthrough curve of uranyl ions for the Dowex 1 resins, of different crosslinking: X4, X8 and X10, was examined. Unexpectedly high increase of exchange capacity of uranium was observed in case of Dowex 1X10. This gives potential opportunity of improving the effectiveness of uranium recovery process. Applying column packed with Dowex 1X10, ‘yellow cake’ with ca. 92% yield and high purity of recovered uranium was obtained. A block diagram of the procedure for uranium and lanthanides extraction from acidic leach liquor has been proposed.

ACS Style

Bożena Danko; Rajmund S. Dybczyński; Zbigniew Samczyński; Dorota Gajda; Irena Herdzik-Koniecko; Grażyna Zakrzewska-Kołtuniewicz; Ewelina Chajduk; Krzysztof Kulisa. Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions. Nukleonika 2017, 62, 213 -221.

AMA Style

Bożena Danko, Rajmund S. Dybczyński, Zbigniew Samczyński, Dorota Gajda, Irena Herdzik-Koniecko, Grażyna Zakrzewska-Kołtuniewicz, Ewelina Chajduk, Krzysztof Kulisa. Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions. Nukleonika. 2017; 62 (3):213-221.

Chicago/Turabian Style

Bożena Danko; Rajmund S. Dybczyński; Zbigniew Samczyński; Dorota Gajda; Irena Herdzik-Koniecko; Grażyna Zakrzewska-Kołtuniewicz; Ewelina Chajduk; Krzysztof Kulisa. 2017. "Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions." Nukleonika 62, no. 3: 213-221.

Journal article
Published: 01 July 2017 in Talanta
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Sr is a widely determined radionuclide for environmental purposes, nuclear waste control, and can be also monitored in coolants in nuclear reactor plants. In the developed method, the ICP-MS detection was employed together with sample processing in sequential injection analysis (SIA) setup, equipped with a lab-on-valve with mechanized renewal of sorbent bed for solid-phase extraction. The optimized conditions of determination included preconcentration of Sr on cation-exchange column and removal of different type of interferences using extraction Sr-resin. The limit of detection of the developed procedure depends essentially on the configuration of the employed ICP-MS spectrometer and on the available volume of the sample to be analyzed. For 1L initial sample volume, the method detection limit (MDL) value was evaluated as 2.9ppq (14.5BqL). The developed method was applied to analyze spiked river water samples, water reference materials, and also simulated and real samples of the nuclear reactor coolant.

ACS Style

Kamila Kołacińska; Ewelina Chajduk; Jakub Dudek; Zbigniew Samczyński; Edyta Łokas; Anna Bojanowska-Czajka; Marek Trojanowicz. Automation of sample processing for ICP-MS determination of 90 Sr radionuclide at ppq level for nuclear technology and environmental purposes. Talanta 2017, 169, 216 -226.

AMA Style

Kamila Kołacińska, Ewelina Chajduk, Jakub Dudek, Zbigniew Samczyński, Edyta Łokas, Anna Bojanowska-Czajka, Marek Trojanowicz. Automation of sample processing for ICP-MS determination of 90 Sr radionuclide at ppq level for nuclear technology and environmental purposes. Talanta. 2017; 169 ():216-226.

Chicago/Turabian Style

Kamila Kołacińska; Ewelina Chajduk; Jakub Dudek; Zbigniew Samczyński; Edyta Łokas; Anna Bojanowska-Czajka; Marek Trojanowicz. 2017. "Automation of sample processing for ICP-MS determination of 90 Sr radionuclide at ppq level for nuclear technology and environmental purposes." Talanta 169, no. : 216-226.

Article
Published: 20 September 2016 in Journal of Radioanalytical and Nuclear Chemistry
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In this work a determination of selected elements in the infant formulas commercially available on the Polish market was done. 14 different materials (milk-based formulas and grain porridges) were analyzed. Both, inductively coupled plasma mass spectrometry (ICP-MS) and instrumental neutron activation analysis (INAA) were applied for the determination of As, Cr, Fe and Se, which are recognized as the problematic elements for ICP-MS. For As and Se, the radiochemical NAA was also used. The daily intake of Se and Fe in the age 0–6 months for non-breast fed infants was estimated and compared with present safety limits.

ACS Style

Ewelina Chajduk; Halina Polkowska-Motrenko. Application of ICP-MS, INAA and RNAA to the determination of some “difficult” elements in infant formulas. Journal of Radioanalytical and Nuclear Chemistry 2016, 311, 1347 -1353.

AMA Style

Ewelina Chajduk, Halina Polkowska-Motrenko. Application of ICP-MS, INAA and RNAA to the determination of some “difficult” elements in infant formulas. Journal of Radioanalytical and Nuclear Chemistry. 2016; 311 (2):1347-1353.

Chicago/Turabian Style

Ewelina Chajduk; Halina Polkowska-Motrenko. 2016. "Application of ICP-MS, INAA and RNAA to the determination of some “difficult” elements in infant formulas." Journal of Radioanalytical and Nuclear Chemistry 311, no. 2: 1347-1353.

Journal article
Published: 01 April 2016 in Progress in Nuclear Energy
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Nuclear power plants have suffered various failures through corrosion causing economic losses, increasing the radiation exposure to personnel and increasing the possibility of environmental risk. Many examples of different corrosion mechanisms and their consequences for nuclear power plant (NPP) working conditions are recognized and described. Nevertheless, several issues related to the corrosion of materials used for NPP constructions are still unexplained. This paper gives short, basic information about selected methods of the corrosion reduction and corrosion inhibitors used in coolant systems in nuclear power plants, mainly in pressurized water reactors PWRs and boiling water reactors BWRs. Present data are based in the open scientific and technical literature since 1990.

ACS Style

Ewelina Chajduk; Anna Bojanowska-Czajka. Corrosion mitigation in coolant systems in nuclear power plants. Progress in Nuclear Energy 2016, 88, 1 -9.

AMA Style

Ewelina Chajduk, Anna Bojanowska-Czajka. Corrosion mitigation in coolant systems in nuclear power plants. Progress in Nuclear Energy. 2016; 88 ():1-9.

Chicago/Turabian Style

Ewelina Chajduk; Anna Bojanowska-Czajka. 2016. "Corrosion mitigation in coolant systems in nuclear power plants." Progress in Nuclear Energy 88, no. : 1-9.

Journal article
Published: 01 September 2015 in Nukleonika
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The main objective of the present study was an assessment of the possibility of uranium recovery from domestic resources in Poland. In the first stage uranium was leached from the ground uranium ore by using acidic (sulfuric acid or hydrochloric acid) or alkaline (carbonate) solutions. The leaching efficiencies of uranium were dependent on the type of ore and it reached 81% for Dictyonemic shales and almost 100% for sandstones. The novel leaching routes, with the application of the helical membrane contactor equipped with rotating part were tested. The obtained postleaching solutions were concentrated and purified using solvent extraction or ion exchange chromatography. New methods of solvent extraction, as well as hybrid processes for separation and purification of the product, were studied. Extraction with the use of membrane capillary contactors that has many advantages above conventional methods was also proposed as an alternative purification method. The final product U3O8 could be obtained by the precipitation of ‘yellow cake’, followed by calcination step. The results of precipitation of ammonium diuranate and uranium peroxide from diluted uranium solution were presented

ACS Style

Katarzyna Kiegiel; Grażyna Zakrzewska-Kołtuniewicz; Dorota Gajda; Agnieszka Miśkiewicz; Anna Abramowska; Paweł Biełuszka; Bożena Danko; Ewelina Chajduk; Stanisław Wołkowicz. Dictyonema black shale and Triassic sandstones as potential sources of uranium. Nukleonika 2015, 60, 515 -522.

AMA Style

Katarzyna Kiegiel, Grażyna Zakrzewska-Kołtuniewicz, Dorota Gajda, Agnieszka Miśkiewicz, Anna Abramowska, Paweł Biełuszka, Bożena Danko, Ewelina Chajduk, Stanisław Wołkowicz. Dictyonema black shale and Triassic sandstones as potential sources of uranium. Nukleonika. 2015; 60 (3):515-522.

Chicago/Turabian Style

Katarzyna Kiegiel; Grażyna Zakrzewska-Kołtuniewicz; Dorota Gajda; Agnieszka Miśkiewicz; Anna Abramowska; Paweł Biełuszka; Bożena Danko; Ewelina Chajduk; Stanisław Wołkowicz. 2015. "Dictyonema black shale and Triassic sandstones as potential sources of uranium." Nukleonika 60, no. 3: 515-522.

Journal article
Published: 01 May 2015 in Acta Physica Polonica A
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ACS Style

K. Szkliniarz; J. Jastrzebski; Aleksander Bilewicz; E. Chajduk; J. Choiński; A. Jakubowski; Ł. Janiszewska; E. Leszczuk; Monika Lyczko; M. Sitarz; A. Stolarz; A. Trzcińska; B. Wąs; W. Zipper. Medical Radioisotopes Produced Using the Alpha Particle Beam from the Warsaw Heavy Ion Cyclotron. Acta Physica Polonica A 2015, 127, 1471 -1474.

AMA Style

K. Szkliniarz, J. Jastrzebski, Aleksander Bilewicz, E. Chajduk, J. Choiński, A. Jakubowski, Ł. Janiszewska, E. Leszczuk, Monika Lyczko, M. Sitarz, A. Stolarz, A. Trzcińska, B. Wąs, W. Zipper. Medical Radioisotopes Produced Using the Alpha Particle Beam from the Warsaw Heavy Ion Cyclotron. Acta Physica Polonica A. 2015; 127 (5):1471-1474.

Chicago/Turabian Style

K. Szkliniarz; J. Jastrzebski; Aleksander Bilewicz; E. Chajduk; J. Choiński; A. Jakubowski; Ł. Janiszewska; E. Leszczuk; Monika Lyczko; M. Sitarz; A. Stolarz; A. Trzcińska; B. Wąs; W. Zipper. 2015. "Medical Radioisotopes Produced Using the Alpha Particle Beam from the Warsaw Heavy Ion Cyclotron." Acta Physica Polonica A 127, no. 5: 1471-1474.

Journal article
Published: 19 September 2014 in Journal of Radioanalytical and Nuclear Chemistry
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Three very accurate (definitive) methods by RNAA for the determination of Se, As and Fe respectively, which were recently elaborated in our laboratory, are reviewed and their use in certification of reference materials and in checking the assigned values in proficiency tests is demonstrated on several examples. According to VIM 3 nomenclature these methods may be called: ratio primary reference measurement procedures (RPRMPs). RPRMPs with their expanded uncertainties of 2.7–3.6 % are comparable to ID-MS methods and are the only methods of such high metrological quality which can be used for the determination of trace amounts of monoisotopic elements.

ACS Style

R. S. Dybczynski; H. Polkowska-Motrenko; E. Chajduk; B. Danko; M. Pyszynska. Recent advances in ratio primary reference measurement procedures (definitive methods) and their use in certification of reference materials and controlling assigned values in proficiency testing. Journal of Radioanalytical and Nuclear Chemistry 2014, 302, 1295 -1302.

AMA Style

R. S. Dybczynski, H. Polkowska-Motrenko, E. Chajduk, B. Danko, M. Pyszynska. Recent advances in ratio primary reference measurement procedures (definitive methods) and their use in certification of reference materials and controlling assigned values in proficiency testing. Journal of Radioanalytical and Nuclear Chemistry. 2014; 302 (3):1295-1302.

Chicago/Turabian Style

R. S. Dybczynski; H. Polkowska-Motrenko; E. Chajduk; B. Danko; M. Pyszynska. 2014. "Recent advances in ratio primary reference measurement procedures (definitive methods) and their use in certification of reference materials and controlling assigned values in proficiency testing." Journal of Radioanalytical and Nuclear Chemistry 302, no. 3: 1295-1302.

Journal article
Published: 09 September 2014 in Journal of Radioanalytical and Nuclear Chemistry
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The neutron flux emitted from fusion devices induces many different nuclear reactions that can activate the vacuum chamber and irradiate operators. A γ-spectrometer was mounted inside the Plasma Focus (PF) PF-1000, the world’s largest plasma focus facility, after completing a campaign. Qualitative analysis was performed following a lengthy γ-spectrum acquisition period. Instrumental neutron activation analysis identified the elemental composition of the vacuum chamber for use by a Monte Carlo N-Particle simulation. In this way, the radioactivity accumulated inside the PF-1000 as the function of time was calculated.

ACS Style

S. Jednorog; Halina Polkowska-Motrenko; Kamil Szewczak; B. Bienkowska; M. Paduch; Rafal Prokopowicz; K. Ciupek; Ewelina Chajduk; Z. Samczynski; P. Krajewski; E. Laszynska. Neutron activation of PF-1000 device parts during long-term fusion research. Journal of Radioanalytical and Nuclear Chemistry 2014, 303, 1009 -1014.

AMA Style

S. Jednorog, Halina Polkowska-Motrenko, Kamil Szewczak, B. Bienkowska, M. Paduch, Rafal Prokopowicz, K. Ciupek, Ewelina Chajduk, Z. Samczynski, P. Krajewski, E. Laszynska. Neutron activation of PF-1000 device parts during long-term fusion research. Journal of Radioanalytical and Nuclear Chemistry. 2014; 303 (1):1009-1014.

Chicago/Turabian Style

S. Jednorog; Halina Polkowska-Motrenko; Kamil Szewczak; B. Bienkowska; M. Paduch; Rafal Prokopowicz; K. Ciupek; Ewelina Chajduk; Z. Samczynski; P. Krajewski; E. Laszynska. 2014. "Neutron activation of PF-1000 device parts during long-term fusion research." Journal of Radioanalytical and Nuclear Chemistry 303, no. 1: 1009-1014.

Journal article
Published: 01 August 2014 in Journal of Radioanalytical and Nuclear Chemistry
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The recovery of uranium and other valuable metals from Polish Peribaltic sandstones were examined. The solid–liquid extraction is the first stage of the technology of uranium production and it is crucial for the next stages of processing. In the laboratory experiments uranium was leached with efficiencies 71–100 % by acidic lixiviants. Satisfactory results were obtained for the alkaline leaching process. Almost 100 % of uranium was leached with alkaline carbonate solution. In post leaching solutions only uranium and small amounts of vanadium were present.

ACS Style

Dorota Gajda; Katarzyna Kiegiel; Grazyna Zakrzewska-Koltuniewicz; Ewelina Chajduk; Iwona Bartosiewicz; Stanisław Wołkowicz. Mineralogy and uranium leaching of ores from Triassic Peribaltic sandstones. Journal of Radioanalytical and Nuclear Chemistry 2014, 303, 521 -529.

AMA Style

Dorota Gajda, Katarzyna Kiegiel, Grazyna Zakrzewska-Koltuniewicz, Ewelina Chajduk, Iwona Bartosiewicz, Stanisław Wołkowicz. Mineralogy and uranium leaching of ores from Triassic Peribaltic sandstones. Journal of Radioanalytical and Nuclear Chemistry. 2014; 303 (1):521-529.

Chicago/Turabian Style

Dorota Gajda; Katarzyna Kiegiel; Grazyna Zakrzewska-Koltuniewicz; Ewelina Chajduk; Iwona Bartosiewicz; Stanisław Wołkowicz. 2014. "Mineralogy and uranium leaching of ores from Triassic Peribaltic sandstones." Journal of Radioanalytical and Nuclear Chemistry 303, no. 1: 521-529.

Journal article
Published: 01 June 2014 in Journal of Hazardous Materials
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The paper deals with experimental design and optimization of leaching process of uranium and associated metals from low-grade, Polish ores. The chemical elements of interest for extraction from the ore were U, La, V, Mo, Yb and Th. Sulphuric acid has been used as leaching reagent. Based on the design of experiments the second-order regression models have been constructed to approximate the leaching efficiency of elements. The graphical illustrations using 3-D surface plots have been employed in order to identify the main, quadratic and interaction effects of the factors. The multi-objective optimization method based on desirability approach has been applied in this study. The optimum condition have been determined as P=5 bar, T=120 °C and t=90 min. Under these optimal conditions, the overall extraction performance is 81.43% (for U), 64.24% (for La), 98.38% (for V), 43.69% (for Yb) and 76.89% (for Mo) and 97.00% (for Th).

ACS Style

Grażyna Zakrzewska-Koltuniewicz; Irena Herdzik-Koniecko; Corneliu Cojocaru; Ewelina Chajduk. Experimental design and optimization of leaching process for recovery of valuable chemical elements (U, La, V, Mo, Yb and Th) from low-grade uranium ore. Journal of Hazardous Materials 2014, 275, 136 -145.

AMA Style

Grażyna Zakrzewska-Koltuniewicz, Irena Herdzik-Koniecko, Corneliu Cojocaru, Ewelina Chajduk. Experimental design and optimization of leaching process for recovery of valuable chemical elements (U, La, V, Mo, Yb and Th) from low-grade uranium ore. Journal of Hazardous Materials. 2014; 275 ():136-145.

Chicago/Turabian Style

Grażyna Zakrzewska-Koltuniewicz; Irena Herdzik-Koniecko; Corneliu Cojocaru; Ewelina Chajduk. 2014. "Experimental design and optimization of leaching process for recovery of valuable chemical elements (U, La, V, Mo, Yb and Th) from low-grade uranium ore." Journal of Hazardous Materials 275, no. : 136-145.

Evaluation study
Published: 01 January 2014 in Food Chemistry
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A liquid chromatography–tandem mass spectrometry (LC–MS/MS) method was developed for selenium speciation in dietary supplements. Chromatographic separation was performed on a TSK-Gel ODS-100V column using a mixture of 5 mM ammonium acetate water solution and methanol as a mobile phase. Conditions chosen for this process allowed to separate all investigated chemical compounds of selenium: seleno-l-methionine, methyl-seleno-l-cysteine, l-selenocystine, methaneseleninic acid, selenite and selenate. A tandem mass spectrometer with an ion trap operating in negative or positive ion mode according to the selenium form being determined was used as a detector. Three extraction procedures: water extraction, enzymatic hydrolysis and sequential extraction were used for preparation of samples for the determination of the actual forms of selenium in diet supplements. The developed method was used for analysis of six dietary supplements containing selenium bought in a pharmacy and supermarket. Apart from speciation analysis of selenium content in supplements total selenium content was determined using instrumental neutron activation analysis (INAA). All expected forms of selenium except for selenite were determined using LC–MS/MS technique. It should be stressed that amounts of selenate were smaller than expected.

ACS Style

Joanna Zembrzuska; Henryk Matusiewicz; Halina Polkowska-Motrenko; Ewelina Chajduk. Simultaneous quantitation and identification of organic and inorganic selenium in diet supplements by liquid chromatography with tandem mass spectrometry. Food Chemistry 2014, 142, 178 -187.

AMA Style

Joanna Zembrzuska, Henryk Matusiewicz, Halina Polkowska-Motrenko, Ewelina Chajduk. Simultaneous quantitation and identification of organic and inorganic selenium in diet supplements by liquid chromatography with tandem mass spectrometry. Food Chemistry. 2014; 142 ():178-187.

Chicago/Turabian Style

Joanna Zembrzuska; Henryk Matusiewicz; Halina Polkowska-Motrenko; Ewelina Chajduk. 2014. "Simultaneous quantitation and identification of organic and inorganic selenium in diet supplements by liquid chromatography with tandem mass spectrometry." Food Chemistry 142, no. : 178-187.

Article
Published: 25 October 2013 in Journal of Radioanalytical and Nuclear Chemistry
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Raising role of the nuclear power industry, including governmental plans for the construction of first nuclear power plant in Poland, creates increasing demand for the uranium-based nuclear fuels. The project implemented by Institute of Nuclear Chemistry and Technology concerns the development of effective methods for uranium extraction from low-grade ores and phosphorites for production of yellow cake—U3O8. The Liqui-Cel® Extra-Flow 2.5 × 8 Membrane Contactor produced by CELGARD LLC (Charlotte, NC) company is the main component of the installation for liquid–liquid extraction applied for processing of post leaching liquors. In the process of membrane extraction the uranyl ions from aqueous phase are transported through the membrane into organic phase. The flow of two phases in the system was arranged in co-current mode. The very important element of the work was a selection of extracting agents appropriate for the membrane process. After preliminary experiments comprising tests of membrane resistivity and determination of extraction efficiency, di(2-ethylhexyl)phosphoric acid was found to be most favourable. An important aspect of the work was the adjustment of hydrodynamic conditions in the capillary module. To avoid the membrane wettability by organic solvent and mixing two phases equal pressure drops along the membrane module to minimize the transmembrane pressure, were assumed. Determination of pressure drop along the module was conducted using Bernoulli equation. The integrated process of extraction/re-extraction conducted in continuous mode with application of two contactors was designed.

ACS Style

Paweł Biełuszka; Grażyna Zakrzewska; Ewelina Chajduk; Jakub Dudek. Liquid–liquid extraction of uranium(VI) in the system with a membrane contactor. Journal of Radioanalytical and Nuclear Chemistry 2013, 299, 611 -619.

AMA Style

Paweł Biełuszka, Grażyna Zakrzewska, Ewelina Chajduk, Jakub Dudek. Liquid–liquid extraction of uranium(VI) in the system with a membrane contactor. Journal of Radioanalytical and Nuclear Chemistry. 2013; 299 (1):611-619.

Chicago/Turabian Style

Paweł Biełuszka; Grażyna Zakrzewska; Ewelina Chajduk; Jakub Dudek. 2013. "Liquid–liquid extraction of uranium(VI) in the system with a membrane contactor." Journal of Radioanalytical and Nuclear Chemistry 299, no. 1: 611-619.