<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2025-91-11-34-40</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2655</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АНАЛИЗ ВЕЩЕСТВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SUBSTANCES ANALYSIS</subject></subj-group></article-categories><title-group><article-title>Определение формы нахождения ниобия и тантала по рентгенофлуоресцентным спектрам с использованием волнового спектрометра «Спектроскан Макс-GVM»</article-title><trans-title-group xml:lang="en"><trans-title>Niobium and tantalum speciation by X-ray fluorescence spectra using the wavelength spectrometer «Spectroscan max-GVM»</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахметжанов</surname><given-names>Т. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhmetzhanov</surname><given-names>T. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тимур Фаритович Ахметжанов </p><p>119071, Москва, Ленинский просп., д. 31</p></bio><bio xml:lang="en"><p>Timur F. Akhmetzhanov </p><p>31, Leninsky prosp., Moscow, 119071</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Марьина</surname><given-names>Г. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Marina</surname><given-names>G E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Галина Евгеньевна Марьина </p><p>119071, Москва, Ленинский просп., д. 31</p></bio><bio xml:lang="en"><p>Galina E. Marina </p><p>31, Leninsky prosp., Moscow, 119071</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Межевая</surname><given-names>Л. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Mezevaja</surname><given-names>L Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лилия Юрьевна Межевая </p><p>119049, Москва, Ленинский просп., д. 4</p></bio><bio xml:lang="en"><p>Lilija Yu. Mezevaja </p><p>4, Leninsky prosp., Moscow, 119049</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Филиппов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Filippov</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Николаевич Филиппов</p><p>119071, Москва, Ленинский просп., д. 31; 119049, Москва, Ленинский просп., д. 4</p><p> </p></bio><bio xml:lang="en"><p>Mikhail N. Filippov</p><p>31, Leninsky prosp., Moscow, 119071; 4, Leninsky prosp., Moscow, 119049</p></bio><email xlink:type="simple">mn@filippov.org.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт общей и неорганической химии им. Н. С. Курнакова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kurnakov Institute of General and Inorganic Chemistry of the RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National University of Science and Technology «MISIS»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт общей и неорганической химии им. Н. С. Курнакова РАН; &#13;
Национальный исследовательский технологический университет «МИСиС»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kurnakov Institute of General and Inorganic Chemistry of the RAS; National University of Science and Technology «MISIS»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>11</month><year>2025</year></pub-date><volume>91</volume><issue>11</issue><fpage>34</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ахметжанов Т.Ф., Марьина Г.Е., Межевая Л.Ю., Филиппов М.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Ахметжанов Т.Ф., Марьина Г.Е., Межевая Л.Ю., Филиппов М.И.</copyright-holder><copyright-holder xml:lang="en">Akhmetzhanov T.F., Marina G.E., Mezevaja L.Y., Filippov M.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.zldm.ru/jour/article/view/2655">https://www.zldm.ru/jour/article/view/2655</self-uri><abstract><p>Исследована возможность определения формы нахождения тантала и ниобия в различных соединениях (металлические Ta и Nb, TaH, NbH, Ta2O5, Nb2O5) с помощью отношения интенсивностей линий характеристического рентгеновского излучения (ХРИ) этих элементов. Эксперимент проведен c использованием серийного рентгенофлуоресцентного спектрометра со средним разрешением «Спектроскан Макс-GVM». Для расчета относительной интегральной интенсивности использовали линии L-серии тантала в диапазоне 1000 – 1450 мÅ и L-серии ниобия (5000 – 5400 мÅ). Поскольку различия в соотношении интенсивностей линий ХРИ для разных форм нахождения элементов невелики, особое внимание было уделено обработке спектров для выделения сглаженных интенсивностей линий в выбранных спектральных диапазонах. Предложенный подход позволяет различить все три соединения Ta по интенсивности контура линии TaLβ5,7 после обработки спектра и нормировки на интенсивность линии TaLβ1. В случае ниобия удалось отличить оксид от чистого металла и его гидрида по отношению интенсивностей линий NbLγ1 и NbLβ3,4. Отличить металл от его гидрида таким способом не удалось. Предлагаемый режим регистрации спектров совместим с используемым в стандартной схеме рентгенофлуоресцентного анализа, что в принципе позволяет определять элементный состав и форму нахождения аналитов в одном эксперименте.</p></abstract><trans-abstract xml:lang="en"><p>The possibility of determining the speciation of tantalum and niobium in various compounds (metallic Ta and Nb, TaH, NbH, Ta2O5, and Nb2O5) using the ratio of the intensities of the characteristic emission lines of these elements was investigated. The «Spectroscan Max-GVM» commercial medium-resolution X-ray fluorescence spectrometer was used for experiment. Tantalum L-series lines in the range of 1000 – 1450 mÅ and niobium L-series lines (5000 – 5400 mÅ) were used to calculate the relative integral intensity. Since the difference in the ratios of characteristic emission lines intensities for different element speciation are small, special attention was paid to spectra processing for selection of smoothed line intensities in the spectral ranges chosen. The proposed approach allowed to distinguish Ta compounds using both the intensity ratios of high-lying/low-lying transitions and two low-lying transitions. It was also possible to distinguish all three of Ta speciation forms using the ratio of the most intense (Lβ2,15/Lβ1) lines of the L-series. In the case of Nb, it was possible to distinguish the oxide from the pure metal and its hydride by the ratio of NbLγ1 and NbLβ3,4 intensities, however the proposed approad didn’t allow to distinguish the metal from its hydride. The proposed spectral recording mode is compatible with the mode used in the standard X-ray fluorescence analysis scheme, which, in principle, allows the determination of the elemental composition and form of presence of analytes in a single experiment.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>форма нахождения тантала и ниобия</kwd><kwd>рентгенофлуоресцентные спектры</kwd><kwd>интегральная интенсивность линии</kwd></kwd-group><kwd-group xml:lang="en"><kwd>niobium and tantalum speciation</kwd><kwd>X-ray fluorescence spectra</kwd><kwd>integral intensity of the line</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Минобрнауки России в рамках государственного задания ИОНХ РАН.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Вайнштейн Э. Е. Рентгеновские спектры атомов в молекулах химических соединений и сплавах. — М.: Изд-во АН СССР, 1950. — 206 с.</mixed-citation><mixed-citation xml:lang="en">Vainshtein E. E. X-ray spectra of atoms in molecules of chemical compounds and alloys. — Moscow: Izd. AN SSSR, 1950. — 206 p. [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Блохин М. А. Физика рентгеновских лучей. — М.: Гос. изд-во технико-теоретической литературы, 1957. — 518 с.</mixed-citation><mixed-citation xml:lang="en">Blokhin M. A. Physics of X-rays. — Moscow: Gos. Izd. Tekhn. Teor. Liter., 1957. — 518 p. [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Майзель А., Леонхардт Г., Сирган Р. Рентгеновские спектры и химическая связь. — Киев: Наукова думка, 1981. — 420 с.</mixed-citation><mixed-citation xml:lang="en">Meisel A., Leonhardt G., Szargan R. Röntgenspektren und Chemische Bindung. — Leipzig: Akademische Verlagsgesellschaft Geest u. Portig, 1977. — 319 s. [in German].</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Мазалов Л. Н. Рентгеновские спектры. — Новосибирск: Изд-во ин-та неорганической химии СО РАН, 2003. — 328 с.</mixed-citation><mixed-citation xml:lang="en">Mazalov L. N. X-ray spectra. — Novosibirsk: Izd. Inst. Neorg. Khimii SO RAN, 2003. — 328 p. [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Сумбаев О. И., Петрович Е. В., Смирнов Ю. П. и др. Применение метода малых смещений рентгеновских линий для исследования электронной структуры кристаллохимических связей / Успехи физических наук. 1974. Т. 113. № 6. С. 360 – 361. DOI: 10.3367/ufnr.0113.197406.v0360</mixed-citation><mixed-citation xml:lang="en">Sumbaev O. M., Petrovich E. V., Smirnov Yu. P., et al. Use of a method of small X-ray line shifts to investigate the electronic structure of crystal chemical bonds / Sov. Phys. Usp. 1974. Vol. 17. P. 463 – 464. DOI: 10.1070/pu1974v017n03abeh004102</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Сумбаев О. И. Смещение рентгеновских K-линий при изменениях валентности и изоморфных фазовых переходах в редких землях / Успехи физических наук 1978. Т. 124. № 2. С. 281 – 306. DOI: 10.3367/ufnr.0124.197802c.0281</mixed-citation><mixed-citation xml:lang="en">Sumbaev O. M. Shift of K X-ray lines associated with valency change and with isomorphous phase transitions in rare earths / Sov. Phys. Usp. 1978. Vol. 21. P. 141 – 154. DOI: 10.1070/pu1978v021n02abeh005519</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Овсянникова И. А., Куприянова Т. А., Гольденберг Г. И. Определение валентного состояния и координации атомов по последней эмиссионной линии рентгеновского спектра / Заводская лаборатория. 1987. Т. 53. № 6. С. 45 – 47.</mixed-citation><mixed-citation xml:lang="en">Ovsyannikova I. F., Kupriyanova T. A., Goldenberg G. I. Determination of valency states and coordination of the atoms from the last emission line in X-ray spectrum / Indusr. Lab. 1987. Vol. 53. No. 6. P. 529 – 532 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Филиппов М. Н., Куприянова Т. А., Лямина О. И. Одновременное определение содержания и формы нахождения элемента в твердом теле рентгенофлуоресцентным методом / Журн. аналит. химии. 2001. Т. 56. № 8. С. 817 – 824.</mixed-citation><mixed-citation xml:lang="en">Filippov M. N., Kupriyanova T. F., Lyamina O. I. Simultaneous determination of the concentration of elements and their speciation in solid samples using X-ray fluorescence spectroscopy / J. Anal. Chem. 2001. Vol. 56. No. 8. P. 729 – 735. DOI: 10.1023/a:1016733626879</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Куприянова Т. А., Филиппов М. Н., Лямина О. И. Исследование влияния химической связи на интегральную интенсивность линий эмиссионного спектра мышьяка / Журн. структурной химии. 2003. Т. 44. № 3. С. 460 – 471.</mixed-citation><mixed-citation xml:lang="en">Kupriyanova T. A., Filippov M. N., Lyamina O. I. Chemical band effects on line intensities of arsenic X-ray emission spectrum / J. Struct. Chem. 2003. Vol. 44. No. 3. P. 410 – 419. DOI: 10.1023/b:jory.0000009668.66258.12</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Раутиан С. Г. Реальные спектральные приборы / Успехи физических наук. 1958. Т. 66. № 11. С. 475 – 517. DOI: 10.3367/ufnr.0066.195811d.0475</mixed-citation><mixed-citation xml:lang="en">Rautian S. G. Real spectral apparatus / Sov. Phys. Usp. 1958. Vol. 1. P. 245 – 273. DOI: 10.1070/pu1958v001n02abeh003099</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Porikli S. Influence of the chemical environment changes on the line shape and intensity ratio values for La, Ce and Pr L lines spectra / Chem. Phys. Lett. 2011. Vol. 508. Nos. 1 – 3. P. 165 – 170. DOI: 10.1016/j.cplett.2011.04.021</mixed-citation><mixed-citation xml:lang="en">Porikli S. Influence of the chemical environment changes on the line shape and intensity ratio values for La, Ce and Pr L lines spectra / Chem. Phys. Lett. 2011. Vol. 508. Nos. 1 – 3. P. 165 – 170. DOI: 10.1016/j.cplett.2011.04.021</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Sato K., Yoneda T., Izumi T., et al. Evaluation of analytical precision of polychromatic simultaneous WDXRF spectrometer and application to valence analysis of cathode materials of lithium-ion batteries / Anal. Chem. 2020. Vol. 92. No. 1. P. 758 – 765. DOI: 10.1021/acs.analchem.9b03075</mixed-citation><mixed-citation xml:lang="en">Sato K., Yoneda T., Izumi T., et al. Evaluation of analytical precision of polychromatic simultaneous WDXRF spectrometer and application to valence analysis of cathode materials of lithium-ion batteries / Anal. Chem. 2020. Vol. 92. No. 1. P. 758 – 765. DOI: 10.1021/acs.analchem.9b03075</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Sato K., Nishimura A., Kaino M., Adachi S. Polychromatic simultaneous WDXRF for chemical state analysis using laboratory X-ray source / X-Ray Spectrom. 2017. Vol. 46. P. 330 – 335. DOI: 10.1002/xrs.2797</mixed-citation><mixed-citation xml:lang="en">Sato K., Nishimura A., Kaino M., Adachi S. Polychromatic simultaneous WDXRF for chemical state analysis using laboratory X-ray source / X-Ray Spectrom. 2017. Vol. 46. P. 330 – 335. DOI: 10.1002/xrs.2797</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Chubarov V. Novel application of the X-ray fluorescence method for the determination of FeO content for reference materials characterization / Talanta. 2025. Vol. 282. 126981. DOI: 10.1016/j.talanta.2024.126981</mixed-citation><mixed-citation xml:lang="en">Chubarov V. Novel application of the X-ray fluorescence method for the determination of FeO content for reference materials characterization / Talanta. 2025. Vol. 282. 126981. DOI: 10.1016/j.talanta.2024.126981</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Chubarov V. M. New approach for direct determination of manganese valence state in ferromanganese nodules by X-ray fluorescence spectrometry / Minerals. 2023. Vol. 13. No. 10. 1329. DOI: 10.3390/min13101329</mixed-citation><mixed-citation xml:lang="en">Chubarov V. M. New approach for direct determination of manganese valence state in ferromanganese nodules by X-ray fluorescence spectrometry / Minerals. 2023. Vol. 13. No. 10. 1329. DOI: 10.3390/min13101329</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Malherbe J., Claverie F. Toward chromium speciation in solids using wavelength dispersive X-ray fluorescence spectrometry CrKβ lines / Anal. Chim. Acta. 2013. Vol. 773. P. 37 – 44. DOI: 10.1016/j.aca.2013.02.035</mixed-citation><mixed-citation xml:lang="en">Malherbe J., Claverie F. Toward chromium speciation in solids using wavelength dispersive X-ray fluorescence spectrometry CrKβ lines / Anal. Chim. Acta. 2013. Vol. 773. P. 37 – 44. DOI: 10.1016/j.aca.2013.02.035</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Durdağı S. P. Chemical environment change analysis on L X-ray emission spectra of some lanthanide compounds / Microchem. J. 2017. Vol. 130. P. 27 – 32. DOI: 10.1016/j.microc.2016.07.025</mixed-citation><mixed-citation xml:lang="en">Durdağı S. P. Chemical environment change analysis on L X-ray emission spectra of some lanthanide compounds / Microchem. J. 2017. Vol. 130. P. 27 – 32. DOI: 10.1016/j.microc.2016.07.025</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Durdağı S., Taşpolat A. Determination of the chemical effect in the lanthanide group of elements using wave dispersive X-ray spectrometry / J. Phys. Chem. Funct. Mater. 2018. Vol. 1. No. 2. P. 1 – 11.</mixed-citation><mixed-citation xml:lang="en">Durdağı S., Taşpolat A. Determination of the chemical effect in the lanthanide group of elements using wave dispersive X-ray spectrometry / J. Phys. Chem. Funct. Mater. 2018. Vol. 1. No. 2. P. 1 – 11.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Durdağı S., Güzel F. Characterization of the chemical shift and asymmetry indices of praseodium, neodymium, samarium, gadolinium, and terbium compounds by wavelength dispersive X-ray fluorescence (WDXRF) / Instrum. Sci. Technol. 2023. Vol. 51. No. 2. P. 209 – 221. DOI: 10.1080/10739149.2022.2115511</mixed-citation><mixed-citation xml:lang="en">Durdağı S., Güzel F. Characterization of the chemical shift and asymmetry indices of praseodium, neodymium, samarium, gadolinium, and terbium compounds by wavelength dispersive X-ray fluorescence (WDXRF) / Instrum. Sci. Technol. 2023. Vol. 51. No. 2. P. 209 – 221. DOI: 10.1080/10739149.2022.2115511</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Chubarov V. M., Finkelshtein A. L., Skornikova S. A. Determination of platinum valence state in alumina based catalysts by X-Ray fluorescence spectrometry / Spectrochim. Acta. Part B. 2023. Vol. 209. 106803. DOI: 10.1016/j.sab.2023.106803</mixed-citation><mixed-citation xml:lang="en">Chubarov V. M., Finkelshtein A. L., Skornikova S. A. Determination of platinum valence state in alumina based catalysts by X-Ray fluorescence spectrometry / Spectrochim. Acta. Part B. 2023. Vol. 209. 106803. DOI: 10.1016/j.sab.2023.106803</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Kapil A., Kailash, Rani R., et al. Study of chemical effects on L X-rays spectra of 59Pr compounds using high resolution WDXRF and EDXRF measurements / Appl. Radiat. Isot. 2024. Vol. 205. 111185. DOI: 10.1016/j.apradiso.2024.111185</mixed-citation><mixed-citation xml:lang="en">Kapil A., Kailash, Rani R., et al. Study of chemical effects on L X-rays spectra of 59Pr compounds using high resolution WDXRF and EDXRF measurements / Appl. Radiat. Isot. 2024. Vol. 205. 111185. DOI: 10.1016/j.apradiso.2024.111185</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Филиппов М. Н., Межевая Л. Ю., Барановская В. Б. Современные тенденции применения и аналитического контроля ниобия и тантала. Краткий обзор / Аналитика. 2023. Т. 13. № 5. С. 366 – 378. DOI: 10.22184/2227-572x.2023.13.5.366.378</mixed-citation><mixed-citation xml:lang="en">Filippov M.N., Mezhevaja L. Yu., Baranovskaia V. B. Current trends in the application and analytical control of niobium and tantalum. Short review / Analytics. 2023. Vol. 13. No. 5. P. 366 – 378 [in Russian]. DOI: 10.22184/2227-572x.2023.13.5.366.378</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Межевая Л. Ю., Филиппов М. Н., Лямина О. И. и др. Рентгенофлуоресцентный экспресс-анализ технического тантала и ниобия: от сырья до продукта / Заводская лаборатория. Диагностика материалов. 2023. Т. 89. № 6. С. 5 – 12. DOI: 10.26896/1028-6861-2023-89-6-5-12</mixed-citation><mixed-citation xml:lang="en">Mezhevaja L. Yu., Filippov M. N., Lyamina O. I., et al. Express X-ray fluorescence analysis of technical-grade tantalum and niobium: from raw materials to products / Inorg. Mater. 2024. Vol. 60. P. 38 – 44. DOI: 10.1134/s0020168524700067</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Akhmetzhanov T. F., Cherkashina T. Y., Zhilicheva A. N., et al. Total-reflection X-ray fluorescence determination of thorium and uranium in the presence of interfering elements in solid geological objects of natural and technogenic origin / J. Anal. At. Spectrom. 2023. Vol. 38. P. 2664 – 2673. DOI: 10.1039/d3ja00260h</mixed-citation><mixed-citation xml:lang="en">Akhmetzhanov T. F., Cherkashina T. Y., Zhilicheva A. N., et al. Total-reflection X-ray fluorescence determination of thorium and uranium in the presence of interfering elements in solid geological objects of natural and technogenic origin / J. Anal. At. Spectrom. 2023. Vol. 38. P. 2664 – 2673. DOI: 10.1039/d3ja00260h</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
