Wyniki wyszukiwania - Biblioteka Nauki

1

Depot z mladšej až neskorej doby bronzovej zo Stakčína

100%

Makarová E. , Harčar P.

Zborník Slovenského národného múzea Archeológia

|

2022

|

nr 116

57-70

EN

Several small hoards of bronze objects have recently been found in the territory of north-eastern Slovakia. One of them – including two small bronze socketed axes and one spiral-shaped ornament – was found in the cadastral territory of the municipality of Stakčín (district of Snina), position Hlboké. The finds can be generally classified under the Late and Final Bronze Age, from the point of view of their cultural affiliation with the Gáva culture. Apart from typological and topographical analysis of the find, all three objects were subjected to elemental analysis by means of the XRF method. This hoard enriches current knowledge about the settlement of this so far scarcely studied area east of the upper course of the Laborec River and about the finds located in mountainous regions.

2

Quasi Real-Time X-Ray Fluorescence Spectrometer in Source Apportionment of Particulate Matter in a Typical Suburban Area

100%

Mach T. , Rybak J. , Bihałowicz J. , Rogula-Kozłowska W.

Journal of Ecological Engineering

|

2022

|

tom Vol. 23, nr 10

89--97

EN

The article studies the data from a weekly campaign devoted to the study of the elemental composition of PM10 in a selected receptor, in a suburban area (Mazowieckie Voivodeship). The sampling point was located at the intersection of main roads and in the vicinity of a typical single-family housing, not far from the electrified Warsaw-Białystok railway line and a small heating plant. The research was carried out in the summer season, in order to minimize the impact of municipal emissions on the concentrations and elemental composition of PM10. A Horiba PX-375 X-ray fluorescence spectrometer was used to measure the one-hour concentrations of elements related to PM10. On the basis of the obtained results, the enrichment factors for PM10 in the analyzed elements (EF) were calculated and the principal components analysis (PCA) was performed. It was found that although the elemental composition of PM10 in all tested time intervals was noticeably influenced by the emissions from transport, the municipal emissions had a significant impact on the elemental composition, especially those related to coal combustion, and thus the concentration of PM10 during the study period. It seems that the possibility of observing the influence of all relevant sources on the composition and concentration of PM10 was possible owing to the use of hourly-averaged measurements of the elemental composition of PM10. In the case of daily averaged measurements, in a receptor with such PM10 elemental profile, it would be impossible to determine the periods, in which specific – qualitatively completely different – emission sources dominate.

3

Bronzové fragmenty z Usli

100%

Odler M. , Kmošek J.

Pražské egyptologické studie (Prague Egyptological Studies)

|

2014

|

nr 13

56-60

EN

The excavations of the Czech Institute of Egyptology at the temple at Usli (Bárta et al. 2013b) have brought to light several bronze fragments (Figs. 1–2), which have been found in a secondary position among the blocks of the stone floor of the temple. Fragments Aand B were examined following archaeological documentation by means of ametallographic section and analysed by SEM–EDS. Fragment A has been interpreted as a bronze plaque from a foundation deposit, made of leaded bronze with traces of arsenic, cast without further processing (Figs. 4–6, Table 1). Fragment B is a fragment of a chisel, made of tin bronze with 0.7 % Pb and 0.1 % P, annealed after casting (Figs. 7–8, Table 1). The chisel might have been part of the foundation deposit as well; tools had occurred in foundation deposits since Dynasty 11 and metal/bronze plaques since Dynasty 19 (Weinstein 1973). Analogies of the artefacts have been published by Cowell from Nuri (1997) and from New Kingdom contexts e.g. by Schoske (2007). The current state of research does not allow us to determine whether the fragments could be dated to the New Kingdom or the Napatan Period.

4

New find of a roman lantern from the Czech Republic

100%

Vích D. , Jílek J. , Kmošek J.

Zborník Slovenského národného múzea Archeológia

|

2023

|

nr 117

161-170

EN

In 2021, a functionally undetermined ring and a deformed upright of a Roman lantern were discovered with the help of a metal detector on the slope of the Hušák hill in the cadastral district of Lázy (district Svitavy). Both objects exhibit a similar metal composition. This is the second published find of a part of a Roman lantern from the territory of the Czech Republic and from the Barbaricum in general. The question remains whether the presence of a Roman lantern is related to the evidenced military intervention in the form of a Roman temporary military camp at the nearby town of Jevíčko, and whether the deposition on the slope of a prominent landmark was connected with ritual activities, or with metalworking, or with both.

5

Kumulacja pierwiastków ekologicznie szkodliwych w ziołach pochodzących z różnych rejonów Górnego Śląska

100%

Kot B. , Potoczny K.

Chemik

|

2005

|

tom Vol. 58, nr 6

330-333

PL

Przedstawiono wyniki analizy powszechnie występujących gatunków ziół zebranych z rejonu Górnego Śląska na zawartość Ti, Cr, Fe, Ni, Cu, Zn, i Pb metodą fluorescencyjnej spektrometrii rentgenowskiej. Analizę ziół na zawartość wyżej wymienionych pierwiastków przeprowadzono metodą dodatku wzorca. Badane zioła spopielano, a otrzymany popiół, po dodaniu lepiszcza, prasowano w pastylki. Na podstawie wyników badań stwierdzono, które z badanych ziół wykazują wyższą kumulację analizowanych pierwiastków.

EN

In the presented work the results of the determination of chosen mi-croelements Al. , Zn, Mn, Fe, Cu, Cr, Pb in commonly occurred sorts of collected herbs from the region of Upper Silesia by the use of multielemental XRF analysis have been presented. The multiple standard addition method was applied in this analysis. Investigated herbs were ashed and pressed with the liquid binder. On the basis of the obtained results it was found which kinds of common herbs perform greater cumulation property with regard to analysed elements.

6

A method for the determination of mass per unit area inhomogenity of thin samples in XRF analysis

100%

Sitko R. , Jurczyk J.

Chemia Analityczna

|

1999

|

tom Vol. 44, No. 6

1033-1040

EN

The authors have presented a simple method for the determination of possible inhomogeneity of thin samples in a wavedisperive XRF analysis after previous examination of intensity distribution of exciting radiation on sample's surface. Investigates were carried out using as an example microsamples of mono- and polycrystals. Samples were prepared by digesting an analyzed material directly on the substrate. The obtained results have been presented in a graphical way.

PL

Autorzy przedstawili prosty sposób wyznaczania ewentualnej niejednorodności cienkich próbek w falowodyspersyjnej analizie XRF po uprzednim przebadaniu rozkładu natężenia promieniowania wzbudzającego l1a powicrzchl1i próbki. Badania przeprowadzono na przykładzie mikropróbek mono- i polikryształów. Próbki przygotowywano poprzez roztwarzane badanego materiału bezpośrednio na podłożu. Uzyskane wyniki przedstawiono graficznie.

7

Eneolithic metal objects hoard from Kałdus, Chełmno commune, kujawsko-pomorskie voivodeship

84%

Adamczak K. , Kowalski Ł. , Bojarski J. , Weinkauf M. , Garbacz-Klempka A.

Sprawozdania Archeologiczne

|

2015

|

tom 67

199-219

EN

The paper presents the results of archaeological and metallurgical research performed on a hoard of three metal objects: a double spiral ornament, a dagger and a hammer-axe. The artefacts were discovered at site 2 in Kałdus, Chełmno commune, kujawsko-pomorskie voivodeship. The objects were discovered within the Wiórek phase of a Funnel Beaker culture context. They were probably deposited into a votive pit. Typological analyses have been carried out. The relative chronology of the objects was determined by the results of typological analyses. The dagger is of Usatovo type and the typological classification of the other objects causes difficulties. The hoard is dated to the second half of the 4th millennium cal. BC. The artefacts’ chemical composition and macrostructure analyses were also performed. It has been concluded that all the objects from the hoard were made of arsenic copper with the dagger also enriched with arsenic minerals. The manufacture technique and objects’ usage traces have been recognized. Using the results of typological and chemical analyses the provenance of the hoard from Kałdus is discussed

8

Thin sample in the XRF analysis. A new method of preparing microsamples of mono- and polycrystals and of silicate rocks

84%

Jurczyk J. , Sitko R. , Buhl F. , Jendrzejewska I.

Chemia Analityczna

|

1999

|

tom Vol. 44, No. 2

167-186

EN

The authors have described a new method ofpreparation ofthin samples, which consists in digesting of the material studied directly on the substrate. Investigations were carried out in the sub- and microanalytical area with mono- and polycrystals of spinel structure (samples' mass from D. I to 1.2 mg), and in the semimicroanalytical area with silicate rocks (samples' mass from 5 to 5D mg). Relative thicknesses of samples as well as errors resulting from the lack of linear relationship between concentration and intensity of radiation have been determined using simple mathematical methods. A simplified method of performing the calibration has been applied by using one standard of diversified masses In the case of submicroanalysis of mono- and polycrystals, a possibility of neglecting the interelement influences allowed for using a linear regres-sion in the calibration. In the semimicroanalytical area (rock analysis), the appropriate mathematical models have been used to improve the results

PL

Autorzy opisali nowy sposób przygotowania cienkich próbek polegający na roztwarza-niu badanego materiału bezpośrednio na podłożu. Badania przeprowadzono w obszarze sub- i mikroanalitycznym na przykładzie mono- i polikryształów o budowie spineli (odważki od D. I do 1.2mg) oraz w obszarze semimikroanalitycznym na przykładzie skał krzemianowych (odważki od 5 do 5Dmg). Stosując proste metody matematyczne wY-znaczono względne grubości próbek oraz blędy wynikające z braku liniowej zależności pomiędzy koncentt.acją a intensywnością promieniowania. Zastosowano uproszczony sposób wykonania kalibracji z wykorzystaniem jednego wzorca o zróżnicowanych masach. W przypadku submikroanalizy mono- i polik1-yształów możliwość zaniedbania wpływów międzypierwiastkowych pozwolił a na wykorzystanie regresji liniowej do kalibracji. W obszarze semimikroanalitycznym (analiza skał) do poprawy wyników wykorzystano odpowiednie modele matematyczne-

9

Application of XRF and XRD methods for fast analysis of fused iron catalyst for ammonia synthesis

84%

Szczuko D. , Arabczyk W.

Chemia Analityczna

|

2000

|

tom Vol. 45, No. 2

273-280

EN

A fast method for the determination of chemical composition of fused iron catalyst for ammonia synthesis was developed. The catalysts with different amount of promoters and with different oxidation state of iron were examined. The chemical composition of catalysts was determined using XRF, XRD, ICP spectroscopy, flame photometry and man-ganometric titration. Calibration curves for CaO, Al(2)O(3) and K(2)O were plotted. Using XRD method the dependence of the relative Fe(200) and Fe(3)O(4)(400) peak intensity ratio on iron oxidation state was plotted. This dependence, however was different for magnetite and for wustite catalysts. Using this method for catalysts containing cobalt the total amount of cobalt and iron with second oxidation state was determined.

PL

Opracowano szybką metodę określania składu chemicznego stopowego katalizatora żelazowego do syntezy amoniaku. Zbadano katalizatory o różnym składzie i stopniu utlenienia. Przy użyciu metod takich jak XRF, XRD, spektroskopia ICP, fotometria płomieniowa i manganometria określono ich skład chemiczny. Wykreślono krzywe kalibracji dla CaO, Al(2)O(3) i K(2)O. Stosując dyfrakcję promieni rentgenowskich wykreślono zależność stosunku intensywności pików Fe(200) i Fe(3)O(4)(400) od stopnia utlenienia żelaza. Stwierdzono, że ta sama zależność nie może być zastosowana jednocześnie dla katalizatorów konwencjonalnych i wustytowych. Stosując tą metodę dla katalizatorów zawierających kobalt określono ilość kobaltu i żelaza na drugim stopniu utlenienia.

10

XRF analysis of powder microsamples of multielement mono- and polycrystals. Determination of Cr, Mn, Ni, Cu, Zn, Ga, As, Se, Sb, Yb

84%

Jurczyk J. , Sitko R. , Zawisza B.

Chemia Analityczna

|

2000

|

tom Vol. 45, No. 3

415-428

EN

A quick method has been worked out for preparation of powder samples in the sub-microanalytical area for XRF analysis. Investigations were carried out using as an example three- and four-component mono- and polycrystals: CuZnCrSe, ZnGaCrSe, CuNiCrSe, ZnNiCrSe, YbZnSb, YbMnAs, ZnMnAs. The concentrations of elements being determined were in the range: Cu 12-40%, Zn 2.7-28%, Cr 0.8-24%, Se 53-67%, Ni 0.5-13%, Yb 24-49%, Mn 23-37%, As 28-43%, Sb -48%, Ga -0.4%. Powdered and weighed material (0.5 mg) is transferred onto the substrate (a Millipore filter) and a few drops of carbon tetrachloride are dropped. After drying a sample with uniformly distrib-uted material is formed. Then acetone is dropped and after drying at room temperature a Millipore filter forms a smooth thin film with "embedded" grains of the analyzed material. Minimization of matrix effects due to application of thin layer method allows to prepare calibration curves common for various materials. The obtained limits of detection for 0.5 mg samples are, in ug: Cr - 0.34, Mn - 0.22, Ni - 0.20, Cu - 0.29, Zn - 0.32, Ga -0.27, As - 0.37, Se - 0.40, Sb - 1.82, Yb - 1.27.

PL

Opracowano szybką metodę przygotowywania próbek proszkowych w obszarze sub-mikroanalitycznym do analizy XRF. Badania prowadzono na przykładzie trój- i cztero-składnikowych mono- i polikryształów: CuZnCrSe, ZnGaCrSe, CuNiCrSe, ZnNiCrSe, YbZnSb, YbMnAs, ZnMnAs. Oznaczane pierwiastki występowały w zakresie stężeń: Cu 12-40%, Zn 2.7-28%, Cr 0.8-24%, Se 53-67%, Ni 0.5-13%, Yb 24-49%, Mn 23-37%, As 28-43%, Sb -48%, Ga -0.4%. Rozdrobniony i odważony materiał (0.5 mg) przenosi się na podłoże (sączek Millipore) i nakrapla kilka kropel tetrachlorku węgla. Po wyschnięciu z utworzonej zawiesiny tworzy się próbka z równomiernie rozprowadzonym materiałem. Następnie nakrapla się aceton, po wysuszeniu w temperaturze pokojowej sączek Millipore tworzy cienki, gładki film z „wtopionymi" ziarnami analizowanego materiału. Minimalizacja efektów matrycy dzięki zastosowaniu techniki cienkiej warstwy pozwoliła na sporządzenie wykresów kalibracyjnych wspólnych dla różnych materiałów. Uzyskane granice wykrywalności dla próbek o masie 0.5 mg wynoszą w mg: Cr-0.34, Mn-0.22, Ni-0.20, Cu-0.29, Zn-0.32, Ga - 0.27, As - 0.37, Se - 0.40, Sb - l .82, Yb - l .27.

11

Metoda XRF w analizie wielopierwiastkowej próbek weterynaryjnych

84%

Baranowska I. , Płonka J. , Barchański L.

Chemik

|

2005

|

tom Vol. 58, nr 6

316-319

PL

Analizie metodą fluorescencyjnej spektrometrii rentgenowskiej poddano 24 próbki sierści i 12 próbek pazurów psów z terenów miasta i powiatu gliwickiego. W próbkach badano zawartości: Na, Mg, Si, P, S, K, Ca, Mn, Fe, Cu, Zn, Sr, Ba i Pb. Stwierdzono, że zawartości pierwiastków (za wyjątkiem baru) są około dwukrotnie wyższe w próbkach sierści, w porównaniu z próbkami pazurów. W największych stężeniach występowały siarka i krzem, zarówno w próbkach sierści jak i pazurów. W próbkach sierści, w najmniejszych stę-żeniach występował bar, mangan, ołów. W próbkach pazurów najmniej było miedzi, strontu, baru i ołowiu.

EN

24 hair samples and 12 nails samples of dogs from city and district areas of Gliwice were analyzed using X-ray fluorescence spectrometry. Na, Mg, Si, P, S, K, Ca, Mn, Fe, Cu, Zn, Sr, Ba and Pb content was determined. It was found that elements content (besides Ba) is two times higher in hair samples in comparison to nails samples. Highest concentration of S and Si was found in both hair and nails samples. Lowest concentration of Ba, Mn and Pb was found in hair samples. In nails it was Cu, Sr, Ba and Pb.

12

Determination of chemical composition of (Pb,La)(Zr,Ti)O3 type ferroelectric ceramics by WD-XRF and ED-EPMA

67%

Sitko R. , Zawisza B. , Płońska M. , Malicka E.

Chemia Analityczna

|

2008

|

tom Vol. 53, No. 1

123-131

EN

The stoichiometry determination of lanthanum doped lead zirconate titanate (PLZT) by the wavelength-dispersive X-ray fluorescence spectrometry (WD-XRF) and energy-dis-persive-electron-probe microanalysis (ED-EPMA) is presented. For WD-XRF measurements the analyzed materia! was mixed with boric acid in the ratio 1:20 and pressed into pellets. The multielement standard samples were prepared by mixing appropriate amounts of analyte oxides (PbO, TiO2, ZrO2 and La2O3,) with boric acid. The obtained results were compared with the analysis of PLZT performed by ED-EPMA. The matrix effects were corrected using threoretical influence algorithm for intermediate-thickness samples (WD-XRF) and ZAP method (ED-EPMA).

PL

Przedstawiono metodę oznaczania stechiometrii tytanianu i cyrkonianu ołowiu domieszkowanego lantanem (PLZT) z wykorzystaniem rentgenowskiej spektrometrii fluorescencyjnej z dyspersją długości fali (WD-XRF) i mikroanal izy rentgenowskiej zdyspersjąenergii (ED-EPMA). Do pomiarów WD-XRF analizowany materiał był mieszany z kwasem borowym w stosunku l :20 i prasowany w pastylkę. Wielopierwiastkowe próbki wzorcowe były przygotowane przez zmieszanie odpowiednich ilości tlenków analitów (PbO, TiO2ZrO2 i La2O3) z kwasem borowym. Uzyskane rezultaty porównano z wynikami ED-EPMA. Efekty matrycy korygowano za pomocą algorytmu teoretycznych współczynników wpływów dla próbek o grubości pośredniej (WD-XRF) oraz metodą ZAF (ED-EPMA).