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    Wyświetlanie 1-6 z 6
    Tytuł:
    Results of the 2015 national indoor radon intercomparison measurements in Serbia
    Autorzy:
    Forkapić, S.
    Bikit, K.
    Arsić, V.
    Ilić, J.
    Pantelić, G.
    Živanović, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147750.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    charcoal canisters
    indoor radon
    interlaboratory comparison
    Opis:
    Results and conclusions of interlaboratory comparison of indoor radon in 2015 in Serbia are presented. The participants were three accredited laboratories from Serbia: Serbian Institute of Occupational Health “Dr Dragomir Karajović”, Laboratory for Radioactivity and Dose Measurements at the Faculty of Sciences, University of Novi Sad and Radiation and Environmental Protection Department, Vinča Institute of Nuclear Science. The laboratories make use of the same method for radon measurement, using charcoal canisters according to US Environmental Protection Agency (EPA) protocol 520/5-87-005. Calibration of detection efficiency was performed using EPA radium standard. Radon activity concentrations were determined on the basis of the intensity of short-living radon daughters, 214Bi and 214Pb, gamma lines. The results of intercomparison were evaluated by using the u-test, which was calculated according to the International Atomic Energy Agency criteria. In this paper, not only limitations but also the advantages and possibilities of application of this method for measuring levels of human exposure to radon are discussed
    Źródło:
    Nukleonika; 2016, 61, 3; 321-325
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Laboratory of Natural Radiation (LNR) : a place to test radon instruments under variable conditions of radon concentration and climatic variables
    Autorzy:
    Quindós Poncela, L. S.
    Sainz Fernández, C.
    Gutiérrez-Villanueva, J.-L.
    Fuente Merino, I.
    Celaya González, C.
    Quindós López, L.
    Quindós López, J.
    Fernández Lopez, E.
    Fernández Villar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147764.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    active monitors
    interlaboratory comparison
    in-situ
    radon
    Opis:
    The publication of the new European Union Basic Safety Standards represents a remarkable milestone in the fi eld of radiological protection in terms of adding radon exposure to this framework. Therefore, the coming years will bring the need to measure radon not only in the workplaces but also in the living spaces as a direct outcome of the application of the new EU Directive. So, the importance of having reliable instruments is evident and interlaboratory exercises are becoming more and more popular. However, most of them are carried out under constant conditions of meteorological variables. We present in this paper a facility to broaden the interlaboratory comparisons further by adding the study of radon exposures under real conditions of changes in climatic parameters. In addition, the facility has the possibility to verify the response of radon monitors when the radon concentration changes several orders of magnitude in a short period of time. Our work shows some results of one of the interlaboratory exercises carried out in the premises, where the radon levels were rather homogeneous in the testing room.
    Źródło:
    Nukleonika; 2016, 61, 3; 275-280
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Results of radon CR-39 detectors exposed in schools due two different long-term periods
    Autorzy:
    Stojanovska, Z.
    Boev, B.
    Zunic, Z. S.
    Bossew, P.
    Jovevska, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/147386.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    comparison
    linear regression analysis
    relative bias
    U test
    Opis:
    The paper deals with the recent survey of indoor radon (Rn) results in schools, where paired CR-39 detectors were simultaneously exposed to different long-term periods, i.e., one detector was exposed during the whole year and the other one in the period of the school year duration. To be able to compare the results obtained, for its analysis, the relative bias and U tests were used. It was found that there are no systematic differences between the results, which points that the exposure of the detector during summer vacations did not affect the estimated average annual radon concentration. The paired results were modelled by a linear function, giving an extremely high coeffi cient of determination R2 = 0.99.
    Źródło:
    Nukleonika; 2016, 61, 3; 385-389
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    European inter-comparison studies as a tool for perfecting irradiated food detection methods
    Autorzy:
    Guzik, Grzegorz Piotr
    Michalik, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/2055676.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    detection
    inter-comparison tests
    EPR
    irradiated food
    PSL
    TL
    Opis:
    In this paper, we present the results of inter-comparison studies on identification of irradiated food carried out by the leading European laboratories from 1991 to 2018. In 1990s, the Federal Institute for Health Protection of Consumers and Veterinary Medicine in Germany played the leading role in the organization of the inter-laboratory tests on this subject. At the beginning of the present century, the Spanish Agency for Food Safety and Nutrition and Food National Spanish Centre took over this role. In total, 47 international tests were carried out in which nearly 500 samples of alimentary products were analysed in 37 laboratories from 14 European countries. The tests were aimed at proving the reliability of analytical methods – thermoluminescence (TL), photostimulated luminescence (PSL), and electron paramagnetic resonance (EPR) spectroscopy – for identification of specific irradiated food products and to control the analytical skills and experience of participating laboratories. The results made possible a discussion on why some irradiated food samples are more difficult for identification. In general, the tests showed that TL measurements of products such as herbs, nuts, peppers, and raisins, and EPR studies of fish and chicken bones, fresh strawberries, and dried fruits could be used as reliable control methods. The challenge that control laboratories are facing now, is related to the identifi cation of complex food products such as diet supplements or biopharmaceuticals, in which only some additives are irradiated.
    Źródło:
    Nukleonika; 2021, 66, 3; 91--97
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    National comparison of methods for determination of radon in water
    Autorzy:
    Mazur, Jadwiga
    Kozak, Krzysztof
    Grządziel, Dominik
    Guguła, Szymon
    Mroczek, Mariusz
    Kozłowska, Beata
    Walencik-Łata, Agata
    Podgórska, Zuzanna
    Wołoszczuk, Katarzyna
    Przylibski, Tadeusz A.
    Kowalska, Agata
    Domin, Elżbieta
    Wysocka, Małgorzata
    Chałupnik, Stanisław
    Chmielewska, Izabela
    Długosz-Lisiecka, Magdalena
    Szajerski, Piotr
    Chau, Nguyen Dinh
    Krakowska, Paulina
    Pliszczyński, Tomasz
    Ośko, Jakub
    Dymecka, Małgorzata
    Mazurek, Daria
    Powiązania:
    https://bibliotekanauki.pl/articles/148272.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    AlphaGUARD monitor
    interlaboratory comparison
    LSC method
    radon in water
    Z-score value
    Opis:
    The article describes three interlaboratory experiments concerning 222Rn determination in water samples. The first two experiments were carried out with the use of artificial radon waters prepared by the Laboratory of Radiometric Expertise (LER), Institute of Nuclear Physics, Polish Academy of Sciences in Kraków in 2014 and 2018. The third experiment was performed using natural environment waters collected in the vicinity of the former uranium mine in Kowary in 2016. Most of the institutions performing radon in water measurements in Poland were gathered in the Polish Radon Centre Network, and they participated in the experiments. The goal of these exercises was to evaluate different measurement techniques used routinely in Polish laboratories and the laboratories’ proficiency of radon in water measurements. In the experiment performed in 2018, the reference values of 222Rn concentration in water were calculated based on the method developed at LER. The participants’ results appeared to be worse for low radon concentration than for high radon concentrations. The conclusions drawn on that base indicated the weaknesses of the used methods and probably the sampling. The interlaboratory experiments, in term, can help to improve the participants’ skills and reliability of their results.
    Źródło:
    Nukleonika; 2020, 65, 2; 77-81
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Instrumental neutron activation analysis (INAA) for steel analysis and certification
    Autorzy:
    Polkowska-Motrenko, H.
    Chajduk, E.
    Danko, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/147648.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    steel analysis
    neutron activation analysis (NAA)
    proficiency testing/interlaboratory comparison (PT/ILC)
    certification of steel reference materials
    Opis:
    Instrumental neutron activation analysis (INAA) procedure of elemental steel analysis has been elaborated. The reliability of results obtained by the described procedure has been proved in the frame of different proficiency testing/interlaboratory comparison (PT/ILC) programmes, in which the Institute of Nuclear Chemistry and Technology (INCT, Warsaw) took part since 2005. This work summarizes participation of INCT in these exercises and demonstrates the usefulness of INAA to the certification of steel reference materials.
    Źródło:
    Nukleonika; 2011, 56, 4; 311-315
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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