TY - JOUR AU - Wobrauschek, Peter AU - Ingerle, Dieter AU - Prost, Josef AU - Dhara, Sangita AU - Mishra, Nand Lal AU - Iro, Michael AU - Streli, Christina TI - A new compact micro-XRF spectrometer with polychromatic x-ray sample excitation JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 8 SN - 0049-8246 DO - 10.1002/xrs.3412 UR - https://m2.mtmt.hu/api/publication/34628958 ID - 34628958 LA - English DB - MTMT ER - TY - JOUR AU - Pashkova, Galina V. AU - Nikonova, Alyona A. AU - Dylgerova, Svetlana D. AU - Chuparina, Elena V. AU - Maltsev, Artem S. AU - Zhilicheva, Alena N. AU - Belozerova, Olga Yu. AU - Paradina, Ludmila P. AU - Glyzina, Olga Yu. AU - Khanaev, Igor V. TI - Applicability of total reflection x-ray fluorescence for heavy metal analysis in Lake Baikal sponges JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 11 SN - 0049-8246 DO - 10.1002/xrs.3396 UR - https://m2.mtmt.hu/api/publication/34581816 ID - 34581816 AB - Oxidative stress of Lake Baikal organisms can be caused by pollution of nearshore with anionic surfactants or heavy metals. Some specific heavy metals are essential for aquatic organisms. At present, there are no data concerning heavy metal content caused by anthropogenic pollution or chemotaxonomic features of Baikal sponges. Here, we consider the applicability of total reflection x-ray fluorescence (TXRF) to analyze heavy metals in Lubomirskia baikalensis to fill this gap. It was shown that TXRF method can be successfully applied to the fast and reliable quantification of Cu, Zn, Fe, and Mn in this object. Evaluation of different sample treatment procedures showed that the acid digestion by HNO3/H2O2 mixture is an optimal procedure for the preparation of sponges compared with suspension preparation. It helps to improve sensitivity, eliminate the effects of particle size and specimen heterogeneity. The total uncertainty of the TXRF results associated with the sample preparation, taking, depositing, and measuring of the specimen was 6%-18% for Mn, 3%-5% for Cu, 5%-12% for Fe, and 4%-5% for Zn. To validate the developed method, the TXRF results were compared with the data obtained by wavelength dispersive x-ray fluorescence spectrometry. A good agreement of results was achieved. TXRF data show the dominance of essential heavy metals in L. baikalensis (n = 14) among other heavy metals. Correlations between Cu/Zn contents (R-2 = 0.515) as well as between Fe/Mn contents (R-2 = 0.972) can be explained by the contribution of them to L. baikalensis antioxidant system. LA - English DB - MTMT ER - TY - JOUR AU - Bali, Varun AU - Khajuria, Yugal AU - Manyar, Vidit AU - Rai, Pradeep K. AU - Kumar, Upendra AU - Ghany, Charles AU - Tripathi, Shipra AU - Singh, Vivek K. TI - Elemental studies and mapping of cholesterol and pigment gallstones using scanning electron microscopy-energy dispersive spectroscopy JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 12 SN - 0049-8246 DO - 10.1002/xrs.3403 UR - https://m2.mtmt.hu/api/publication/34339666 ID - 34339666 AB - Gallstone formation is one of the most severe human diseases, with regional differences in gallstone composition worldwide. The formation of gallstones inside the gallbladder is a complex process and is still under debate despite advances in instrumentation. This study was an in-depth analysis of the chemical, structural, and elemental composition of cholesterol and pigment-type gallstones using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS). Thermal gravimetric and differential scanning calorimetry (TG-DSC) analysis was also carried out on gallstones to predict their thermal behavior. FTIR spectroscopy was employed to distinguish the cholesterol and pigment gallstones. Using SEM, we performed the morphological studies of gallstone and EDS were carried out to analyze elemental distribution within the gallstones. Elemental imaging and mapping of the major and minor elements within the cholesterol and black pigment gallstones were carried out, revealing the stone's heterogeneous nature. The level of heavy and toxic elements was found to be higher in pigment stones than in cholesterol gallstones. The results obtained from TG-DSC are well correlated and supported by the results from FTIR spectroscopy. LA - English DB - MTMT ER - TY - JOUR AU - Matsuyama, Tsugufumi AU - Sonoda, Shota AU - Fuchita, Tomoki AU - Sakashita, Shinji AU - Tsuji, Kouichi TI - In situ observation of electrochemical reaction of Zn primer steel plate in NaCl solution using confocal micro-x-ray fluorescence imaging JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 6 SN - 0049-8246 DO - 10.1002/xrs.3401 UR - https://m2.mtmt.hu/api/publication/34278522 ID - 34278522 AB - Steel plates have been widely used in bridges, vehicle bodies, guardrails, and so forth. Generally, to improve corrosion resistance, the surface of a steel plate is coated with a Zn layer. However, when the coated steel plate is scratched by external factors, the corrosion resistance decreases. Therefore, it is important to elucidate the elution processes of elements in coated layers and steel plates to develop new coated films and improve corrosion-resistant techniques. During corrosion, an elution reaction between the coated metal and Fe (anodic reaction) and a reduction reaction of oxygen (cathodic reaction) occur. Confocal micro-x-ray fluorescence imaging was employed to visualize the elution processes at the anodic and cathodic steel plates. A Zn primer steel plate was scratched and then immersed in sodium chloride solution. The Zn elution process at the anodic side was observed when a constant current was applied to the two steel plates by a galvanostat. The Fe elution process did not occur, and we believe that the sacrificial protection of Zn inhibited the process. The elutions of Zn and Fe were not observed on the cathodic side of the steel plate. Using the proposed method, we successfully visualized the elemental distributions at the anodic and cathodic sides of the steel plates. LA - English DB - MTMT ER - TY - JOUR AU - Sanyal, Kaushik AU - Dhara, Sangita TI - Recent advances in ultra-trace determination of uranium in natural water using total reflection X-ray fluorescence (TXRF) spectrometry JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 14 SN - 0049-8246 DO - 10.1002/xrs.3379 UR - https://m2.mtmt.hu/api/publication/34259081 ID - 34259081 AB - This review article describes some of the recent advances in ultra-trace determination of uranium in various natural water bodies such as drinking water, underground water, seawater, etc. using total reflection x-ray florescence (TXRF) spectrometry. Uranium is one of the most hazardous element having chemical as well as radio-toxicity. However, due to its low concentration in water samples, direct determination is seldom possible in samples with high salt content. Various sample preconcentration and selective extraction techniques for uranium such as solvent extraction, dispersive liquid-liquid micro extraction, solid phase extraction, and membrane based preconcentration methods are summarized in this article. TXRF is a very versatile micro-analytical technique with detection limits in picogram range and having multielemental analysis capability. TXRF determination of uranium using U L & alpha; as the analytical line has many analytical challenges and difficulties, mainly due to the severe interference with Rb and Br, both are commonly available in natural water samples. This article highlights some of these challenges, along with the advantages and disadvantages of the different sample preparation techniques used so far for uranium determination in natural water samples by TXRF. LA - English DB - MTMT ER - TY - JOUR AU - Ichikawa, S. AU - Ishikake, Y. AU - Nishi, Y. AU - Kawata, S. AU - Yamakawa, H. AU - Kurisaki, T. TI - Characterization of the iron sand collected from the foot of Mt. Aburayama (Fukuoka, Japan) for estimating the origin of archeological iron artifacts from northern Kyushu JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 SN - 0049-8246 DO - 10.1002/xrs.3391 UR - https://m2.mtmt.hu/api/publication/34195611 ID - 34195611 LA - English DB - MTMT ER - TY - JOUR AU - Chubarov, V.M. AU - Maltsev, A.S. AU - Amosova, A.A. AU - Chuparina, E.V. AU - Prosekin, S.N. AU - Sokolnikova, J.V. TI - Investigation of snow cover solid phase using total-reflection x-ray fluorescence method for an assessment of the environmental pollution JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 SN - 0049-8246 DO - 10.1002/xrs.3384 UR - https://m2.mtmt.hu/api/publication/34195595 ID - 34195595 LA - English DB - MTMT ER - TY - JOUR AU - Vlamaki, G.P. AU - Kallithrakas-Kontos, N.G. AU - Queralt, I. AU - Hidalgo, M. TI - Platinum determination by membrane complexation and energy dispersive x-ray fluorescence analysis—A preliminary study JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 11 SN - 0049-8246 DO - 10.1002/xrs.3368 UR - https://m2.mtmt.hu/api/publication/34027132 ID - 34027132 LA - English DB - MTMT ER - TY - JOUR AU - Bali, Varun AU - Khajuria, Yugal AU - Pathak, Ashok K. AU - Kumar, Upendra AU - Rai, Pradeep K. AU - Ghany, Charles AU - Singh, Vivek K. TI - Elemental concentration in renal stones by wavelength dispersive X-ray fluorescence spectrometry JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 12 SN - 0049-8246 DO - 10.1002/xrs.3338 UR - https://m2.mtmt.hu/api/publication/33911292 ID - 33911292 AB - Renal stone formation inside the kidney is one of the major causes of renal failure all over the world. To create preventative measures, it is crucial to examine renal stone's composition and identify the minerals that are responsible for their pathogenesis. Various concerns regarding the pathophysiology of renal stones remain unresolved and have been put forward. However, till date, the complete information is still unclear. In recent years, spectroscopic studies have gained much attention in identifying the chemical compositions that lead to the formation and growth of renal stones. This work employed wavelength-dispersive X-ray fluorescence (WDXRF) and Fourier transform infrared (FTIR) spectroscopy to study renal stones. WDXRF results of renal stone samples give the presence of numerous heavy and trace elements. Different elemental constituents like zinc (Zn), copper (Cu), iron (Fe), molybdenum (Mo), nickel (Ni), strontium (Sr), chromium (Cr), zirconium (Zr), palladium (Pd), bromine (Br), ruthenium (Ru), lead (Pb), and arsenic (As) were detected and quantified in the renal stones. Vibrational spectroscopic studies were carried out to know the chemical compositions of renal stones such as calcium oxalate monohydrate (COM), uric acid (UA), and carbonate apatite (CA). Quantitative results of WDXRF have been compared with the results from atomic absorption spectroscopy (AAS) of these stone samples. The available clinical details of the patients were correlated with the spectroscopic results obtained using WDXRF and FTIR spectroscopy. LA - English DB - MTMT ER - TY - JOUR AU - Hassebi, Khalil AU - le Guen, Karine AU - Rividi, Nicolas AU - Verlaguet, Anne AU - Jonnard, Philippe TI - Calculation of emission spectra of lithium compounds JF - X-RAY SPECTROMETRY J2 - X-RAY SPECTROM PY - 2023 PG - 6 SN - 0049-8246 DO - 10.1002/xrs.3329 UR - https://m2.mtmt.hu/api/publication/33839863 ID - 33839863 AB - We studied the electronic structure of lithium metal, lithium fluoride, and spodumene using density functional theory. We performed calculations of the total, local and partial density of states, and x-ray emission spectra. We observed changes in the Li K spectra shape and energy position due to the chemical structure and composition modification. We also outline possible interferences between emission bands. LA - English DB - MTMT ER -