<?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">10.26896/1028-6861-2024-90-9-24-31</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2286</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>Практика определения железа методом окислительно-восстановительного титрования в техногенных материалах с повышенным содержанием меди на примере вельц-клинкера</article-title><trans-title-group xml:lang="en"><trans-title>The experience of iron determination in technogenic materials with a high copper content by the redox titration method: case study of the waelz slag</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>Грудинский</surname><given-names>П. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Grudinsky</surname><given-names>P. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павел Иванович Грудинский</p><p>119334, Москва, Ленинский проспект, д. 49</p></bio><bio xml:lang="en"><p>Pavel I. Grudinsky</p><p>49, Leninsky prosp., Moscow, 119334</p></bio><email xlink:type="simple">GruPaul@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юртаева</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yurtaeva</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анфиса Александровна Юртаева</p><p>119334, Москва, Ленинский проспект, д. 49</p><p>125047, Москва, Миусская площадь, д. 9.</p></bio><bio xml:lang="en"><p>Anfisa A. Yurtaeva</p><p>49, Leninsky prosp., Moscow, 119334</p><p>9, Miusskaya pl., Moscow, 125047</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>Дюбанов</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Dyubanov</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валерий Григорьевич Дюбанов</p><p>119334, Москва, Ленинский проспект, д. 49</p></bio><bio xml:lang="en"><p>Valery G. Dyubanov</p><p>49, Leninsky prosp., Moscow, 119334</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт металлургии и материаловедения им. А. А. Байкова Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт металлургии и материаловедения им. А. А. Байкова Российской академии наук; Российский химико-технологический университет им. Д. И. Менделеева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A. A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences; D. I. Mendeleev Russian University of Chemical Technology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт металлургии и материаловедения им. А. А. Байкова Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>D. I. Mendeleev Russian University of Chemical Technology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>22</day><month>09</month><year>2024</year></pub-date><volume>90</volume><issue>9</issue><fpage>24</fpage><lpage>31</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Грудинский П.И., Юртаева А.А., Дюбанов В.Г., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Грудинский П.И., Юртаева А.А., Дюбанов В.Г.</copyright-holder><copyright-holder xml:lang="en">Grudinsky P.I., Yurtaeva A.A., Dyubanov V.G.</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/2286">https://www.zldm.ru/jour/article/view/2286</self-uri><abstract><p>На практике широко используются классические методы определения общего железа, среди которых одним из самых распространенных является окислительно-восстановительное титрование. В известной методике ISO 2597-1 (ГОСТ 32517) анализ включает разложение пробы с ее переведением в раствор, восстановление Fe3+ раствором SnCl2 до Fe2+ и титрование раствором K2Cr2O7 в присутствии индикатора — дифениламиносульфоната натрия или бария. В настоящей работе предложена титриметрическая методика определения общего железа с использованием в качестве восстановителя тетрагидридобората калия вместо SnCl2. Изучены особенности известной и рассматриваемой методик при применении спекания для разложения проб в ходе анализа большого количества образцов. Применение разработанной методики для анализа стандартных образцов и реальных техногенных материалов с повышенным содержанием меди на примере вельц-клинкера показало удовлетворительную точность и воспроизводимость полученных значений общего содержания железа. Результаты свидетельствуют о возможности применения рассматриваемого способа для определения железа в пробах с повышенным содержанием меди без дополнительного этапа отделения железа от меди. Высокая производительность анализа обусловлена отсутствием стадии отделения железа от меди и простотой проведения восстановления при комнатной температуре, а также тем, что не требуется контролировать количество добавляемого восстановителя и титровать раствор сразу после восстановления железа. Указанные преимущества наряду с отсутствием необходимости применения токсичных соединений ртути делают рассматриваемый способ привлекательным для анализа большого количества проб.</p></abstract><trans-abstract xml:lang="en"><p>Redox titration is one of the most common classical methods widely used in practice for the determination of total iron. A well-known procedure ISO 2597-1 (GOST 32517) includes the decomposition of a sample with dissolution, the reduction of Fe3+ to Fe2+ using a SnCl2 solution and its titration with a K2Cr2O7 solution in the presence of sodium or barium diphenylaminosulfonate as an indicator. We propose to use potassium tetrahydroborate KBH4 as a reducing agent for Fe3+ to Fe2+ instead of SnCl2 to modify a titrimetric method of total iron determination. The features of the well-known and considered methods are studied when using sintering for sample decomposition during the analysis of a large number of samples. Application of the developed method for the analysis of standard samples and technogenic materials with a high copper content, namely, Waelz slag showed a satisfactory accuracy and reproducibility of the obtained values of the total iron content. The results obtained indicate the possibility of the application of this method to the iron determination in the samples with a high copper content without an additional step of the iron separation from copper. A high productivity of the analysis (apart from the absence of the separation stage) is achieved due to the simplicity of the reduction process occurred at room temperature, no need for the control of the added amount of the reducing agent, and the possibility of holding the solutions for a long time before the titration. These advantages along with the no need for using toxic mercury compounds during the analysis make the method attractive for the analysis of a large number of samples.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>железо</kwd><kwd>окислительно-восстановительное титрование</kwd><kwd>медь</kwd><kwd>вельц-клинкер</kwd><kwd>тетрагидридоборат калия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>iron</kwd><kwd>redox titration</kwd><kwd>copper</kwd><kwd>Waelz slag</kwd><kwd>potassium tetrahydridoborate</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Росийского научного фонда 24-23-00507, https://rscf.ru/project/24-23-00507</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">ISO 2597-1:2006. Iron ores. Determination of total iron content. Part 1: Titrimetric method after tin (II) chloride reduction n. d. https://www.iso.org/standard/39725.html (дата обращения 16.04.24).</mixed-citation><mixed-citation xml:lang="en">Kim J., Sovacool B. K., Bazilian M., et al. Decarbonizing the iron and steel industry: A systematic review of sociotechnical systems, technological innovations, and policy options / Energy Res. Soc. Sci. 2022. Vol. 89. 102565. DOI: 10.1016/j.erss.2022.102565</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">ГОСТ 32517.1–2013. Руды железные, концентраты, агломераты и окатыши. Методы определения железа общего. — М.: Стандартинформ, 2014. — 10 с.</mixed-citation><mixed-citation xml:lang="en">Sitko R., Zawisza B., Krzykawski T., Malicka E. Determination of chemical composition of siderite in concretions by wavelength-dispersive X-ray spectrometry following selective dissolution / Talanta. 2009. Vol. 77. N 3. P. 1105 – 1110. DOI: 10.1016/j.talanta.2008.08.019</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">ISO 2597-2:2008. Iron ores. Determination of total iron content. Part 2: Titrimetric methods after titanium(III) chloride reduction n.d. https://www.iso.org/standard/43731.html (дата обращения 16.04.24).</mixed-citation><mixed-citation xml:lang="en">Revenko A. G., Pashkova G. V. X-ray fluorescence spectrometry: current status and prospects of development / J. Anal. Chem. 2023. Vol. 78. N 11. P. 1452 – 1458. DOI: 10.1134/s1061934823110072</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Kim J., Sovacool B. K., Bazilian M., et al. Decarbonizing the iron and steel industry: A systematic review of sociotechnical systems, technological innovations, and policy options / Energy Res. Soc. Sci. 2022. Vol. 89. 102565. DOI: 10.1016/j.erss.2022.102565</mixed-citation><mixed-citation xml:lang="en">Katakam L. N. R., Aboul-Enein H. Y. Elemental Impurities Determination by ICP-AES / ICP-MS: A review of Theory, Interpretation of Concentration Limits, Analytical Method Development Challenges and Validation Criterion for Pharmaceutical Dosage Forms / Curr. Pharm. Anal. 2020. Vol. 16. N 4. P. 392 – 403. DOI: 10.2174/1573412915666190225160512</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Sitko R., Zawisza B., Krzykawski T., Malicka E. Determination of chemical composition of siderite in concretions by wavelength-dispersive X-ray spectrometry following selective dissolution / Talanta. 2009. Vol. 77. N 3. P. 1105 – 1110. DOI: 10.1016/j.talanta.2008.08.019</mixed-citation><mixed-citation xml:lang="en">Karimova T. A., Buchbinder G. L., Romanov N., Kachin S. V. Analysis of iron ores by ICP-AES / Industr. Lab. Mater. Diagn. 2021. Vol. 87. N 6. P. 20 – 24 [in Russian]. DOI: 10.26896/1028-6861-2021-87-6-20-24</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Ревенко А. Г., Пашкова Г. В. Рентгенофлуоресцентный анализ: современное состояние и перспективы развития / Журн. аналит. химии. 2023. Т. 78. ¹ 11. С. 980 – 1001. DOI: 10.31857/S0044450223110130</mixed-citation><mixed-citation xml:lang="en">Khan S., Dashora R., Goswami A. K., Purohit D. N. Review of spectrophotometric methods for determination of iron / Rev. Anal. Chem. 2004. Vol. 23. N 1. P. 1 – 74. DOI: 10.1515/revac.2004.23.1.1</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Katakam L. N. R., Aboul-Enein H. Y. Elemental Impurities Determination by ICP-AES / ICP-MS: A review of Theory, Interpretation of Concentration Limits, Analytical Method Development Challenges and Validation Criterion for Pharmaceutical Dosage Forms / Curr. Pharm. Anal. 2020. Vol. 16. N 4. P. 392 – 403. DOI: 10.2174/1573412915666190225160512</mixed-citation><mixed-citation xml:lang="en">Jurayev R. S., Choriev A. U., Qaxxorov N. T. The Photometric Determination of Iron(III) with 2-Napthylcarboxymethylene Citrate / Eng. Proc. 2023. Vol. 48. N 1. 49. DOI: 10.3390/CSAC2023-14878</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Каримова Т. А., Бухбиндер Г. Л., Романов С. Н., Качин С. В. Анализ железорудного сырья методом атомно-эмиссионной спектрометрии с индуктивно-связанной плазмой / Заводская лаборатория. Диагностика материалов. 2021. Т. 87. ¹ 6. С. 20 – 24. DOI: 10.26896/1028-6861-2021-87-6-20-24</mixed-citation><mixed-citation xml:lang="en">Baral A., Pesce S., Yorkshire A. S., et al. Characterisation of iron-rich cementitious materials / Cem. Concr. Res. 2024. Vol. 177. 107419. DOI: 10.1016/j.cemconres.2023.107419</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Khan S., Dashora R., Goswami A. K., Purohit D. N. Review of spectrophotometric methods for determination of iron / Rev. Anal. Chem. 2004. Vol. 23. N 1. P. 1 – 74. DOI: 10.1515/revac.2004.23.1.1</mixed-citation><mixed-citation xml:lang="en">Adlim M., Khaldun I., Rahmi M., et al. Determination of iron content within iron sands from Lampanah-Lengah estuary using various analytical methods / IOP Conf. Ser.: Earth Environ. Sci. 2019. Vol. 348. N 1.012007. DOI: 10.1088/1755-1315/348/1/012007</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Jurayev R. S., Choriev A. U., Qaxxorov N. T. The Photometric Determination of Iron(III) with 2-Napthylcarboxymethylene Citrate / Eng. Proc. 2023. Vol. 48. N 1. 49. DOI: 10.3390/CSAC2023-14878</mixed-citation><mixed-citation xml:lang="en">Mohite B. V. Iron Determination — A Review of Analytical Methods / Asian J. Res. Chem. 2011. Vol. 4. N 3. P. 348 – 361.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Baral A., Pesce S., Yorkshire A. S., et al. Characterisation of iron-rich cementitious materials / Cem. Concr. Res. 2024. Vol. 177. 107419. DOI: 10.1016/j.cemconres.2023.107419</mixed-citation><mixed-citation xml:lang="en">Kroshkina A. B., Stolyarova I. A., Bunakova N. Yu., et al. Determination of titanium, vanadium, chromium and iron-group elements in mineral raw materials. — Moscow: Nedra, 1983. — 184 p. [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Adlim M., Khaldun I., Rahmi M., et al. Determination of iron content within iron sands from Lampanah-Lengah estuary using various analytical methods / IOP Conf. Ser.: Earth Environ. Sci. 2019. Vol. 348. N 1.012007. DOI: 10.1088/1755-1315/348/1/012007</mixed-citation><mixed-citation xml:lang="en">Yang X. J. A rapid and mercury pollution-free redoximetry determination of total iron in copper ore / Talanta. 1994. Vol. 41. N 11. P. 1815 – 1819. DOI: 10.1016/0039-9140(94)E0116-9</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Mohite B. V. Iron Determination — A Review of Analytical Methods / Asian J. Res. Chem. 2011. Vol. 4. N 3. P. 348 – 361.</mixed-citation><mixed-citation xml:lang="en">Hu H., Tang Y., Ying H., et al. The effect of copper on iron reduction and its application to the determination of total iron content in iron and copper ores by potassium dichromate titration / Talanta. 2014. Vol. 125. P. 425 – 431. DOI: 10.1016/j.talanta.2014.03.008</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Крошкина А. Б., Столярова И. А., Бунакова Н. Ю. и др. Определение титана, ванадия, хрома и элементов группы железа в минеральном сырье. — М.: Недра, 1983. — 184 с.</mixed-citation><mixed-citation xml:lang="en">Grudinsky P. I., Zinoveev D. V., Dyubanov V. G., Kozlov P. A. State of the Art and Prospect for Recycling of Waelz Slag from Electric Arc Furnace Dust Processing / Inorg. Mater. Appl. Res. 2019. Vol. 10. N 5. P. 1220 – 1226. DOI: 10.1134/S2075113319050071</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Yang X. J. A rapid and mercury pollution-free redoximetry determination of total iron in copper ore / Talanta. 1994. Vol. 41. N 11. P. 1815 – 1819. DOI: 10.1016/0039-9140(94)E0116-9</mixed-citation><mixed-citation xml:lang="en">Murakami K., Sugawara K., Kawaguchi T. Analysis of Combustion Rate of Various Carbon Materials for Iron Ore Sintering Process / ISIJ Int. 2013. Vol. 53. N 9. P. 1580 – 1587. DOI: 10.2355/isijinternational.53.1580</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Hu H., Tang Y., Ying H., et al. The effect of copper on iron reduction and its application to the determination of total iron content in iron and copper ores by potassium dichromate titration / Talanta. 2014. Vol. 125. P. 425 – 431. DOI: 10.1016/j.talanta.2014.03.008</mixed-citation><mixed-citation xml:lang="en">Mohassab Y., Elzohiery M., Chen F., Sohn H. Y. Determination of total iron content in iron ore and DRI: Titrimetric method versus ICP-OES analysis / EPD Congress 2016 / Allanore A., Bartlett L., Wang C., Zhang L., Lee J. (eds). — Cham: Springer, 2016. P. 125 – 133. DOI: 10.1007/978-3-319-48111-1_15</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Grudinsky P. I., Zinoveev D. V., Dyubanov V. G., Kozlov P. A. State of the Art and Prospect for Recycling of Waelz Slag from Electric Arc Furnace Dust Processing / Inorg. Mater. Appl. Res. 2019. Vol. 10. N 5. P. 1220 – 1226. DOI: 10.1134/S2075113319050071</mixed-citation><mixed-citation xml:lang="en">Itagaki M., Tagaki M., Mori T., Watanabe K. Active dissolution mechanisms of copper in acidic solutions containing sodium fluoride / Corros. Sci. 1996. Vol. 38. N 4. P. 601 – 610. DOI: 10.1016/0010-938X(95)00149-E</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Murakami K., Sugawara K., Kawaguchi T. Analysis of Combustion Rate of Various Carbon Materials for Iron Ore Sintering Process / ISIJ Int. 2013. Vol. 53. N 9. P. 1580 – 1587. DOI: 10.2355/isijinternational.53.1580</mixed-citation><mixed-citation xml:lang="en">Zhigach A. F., Stasinevich D. S. Chemistry of hydrides. — Moscow: Khimiya, 1969. — 676 p [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Mohassab Y., Elzohiery M., Chen F., Sohn H. Y. Determination of total iron content in iron ore and DRI: Titrimetric method versus ICP-OES analysis / EPD Congress 2016 / Allanore A., Bartlett L., Wang C., Zhang L., Lee J. (eds). — Cham: Springer, 2016. P. 125 – 133. DOI: 10.1007/978-3-319-48111-1_15</mixed-citation><mixed-citation xml:lang="en">Glavee G. N., Klabunde K. J., Sorensen C. M., Hadjipanayis G. C. Borohydride Reduction of Nickel and Copper Ions in Aqueous and Nonaqueous Media. Controllable Chemistry Leading to Nanoscale Metal and Metal Boride Particles / Langmuir. 1994. Vol. 10. N 12. P. 4726 – 4730. DOI: 10.1021/la00024a055</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Itagaki M., Tagaki M., Mori T., Watanabe K. Active dissolution mechanisms of copper in acidic solutions containing sodium fluoride / Corros. Sci. 1996. Vol. 38. N 4. P. 601 – 610. DOI: 10.1016/0010-938X(95)00149-E</mixed-citation><mixed-citation xml:lang="en">Shen J., Li Z., Chen Y. Preparation of Fe – B ultrafine amorphous alloy particles by the reaction of ferric chloride and potassium borohydride in aqueous solution / J. Mater. Sci. Lett. 1994. Vol. 13. P. 1208 – 1210. DOI: 10.1007/BF00241014</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Жигач А. Ф., Стасиневич Д. С. Химия гидридов. — М.: Химия, 1969. — 676 с.</mixed-citation><mixed-citation xml:lang="en">Kulagina E. S., Fokina L. S. The use of a weight automatic titrator «Titrion» in the certification of the reference materials / Industr. Lab. Mater. Diagn. 2018. Vol. 84. N 1. Part II. P. 54 – 56 [in Russian]. DOI: 10.26896/1028-6861-2018-84-1(II)-54-56</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Glavee G. N., Klabunde K. J., Sorensen C. M., Hadjipanayis G. C. Borohydride Reduction of Nickel and Copper Ions in Aqueous and Nonaqueous Media. Controllable Chemistry Leading to Nanoscale Metal and Metal Boride Particles / Langmuir. 1994. Vol. 10. N 12. P. 4726 – 4730. DOI: 10.1021/la00024a055</mixed-citation><mixed-citation xml:lang="en">Cappelletti S., Piacentino D., Fineschi V., et al. Mercuric chloride poisoning: symptoms, analysis, therapies, and autoptic findings. A review of the literature / Crit. Rev. Toxicol. 2019. Vol. 49. N 4. P. 1 – 13. DOI: 10.1080/10408444.2019.1621262</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Shen J., Li Z., Chen Y. Preparation of Fe – B ultrafine amorphous alloy particles by the reaction of ferric chloride and potassium borohydride in aqueous solution / J. Mater. Sci. Lett. 1994. Vol. 13. P. 1208 – 1210. DOI: 10.1007/BF00241014</mixed-citation><mixed-citation xml:lang="en">Kaufman S., DeVoe H. Iron Analysis by Redox Titration: A General Chemistry Experiment / J. Chem. Educ. 1988. Vol. 65. N 2. P. 183. DOI: 10.1021/ed065p183</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Кулагина Е. С., Фокина Л. С. Применение весового автоматического титратора «Титрион» при аттестации стандартных образцов / Заводская лаборатория. Диагностика материалов. 2018. Т. 84. № 1. Ч. II. С. 54 – 56. DOI: 10.26896/1028-6861-2018-84-1(II)-54-56</mixed-citation><mixed-citation xml:lang="en">Bhargava O. P., Alexiou A., Hines W. G. Rapid method for total iron determination in iron ores, sinter and related materials without use of mercury compounds / Talanta. 1978. Vol. 25. N 6. P. 357 – 358. DOI: 10.1016/0039-9140(78)80143-X</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Cappelletti S., Piacentino D., Fineschi V., et al. Mercuric chloride poisoning: symptoms, analysis, therapies, and autoptic findings. A review of the literature / Crit. Rev. Toxicol. 2019. Vol. 49. N 4. P. 1 – 13. DOI: 10.1080/10408444.2019.1621262</mixed-citation><mixed-citation xml:lang="en">Kolthoff I. M., Noponen G. E. Diphenylamine Sulfonic Acid as a Reagent for the Colorimetric Determination of Nitrates / J. Am. Chem. Soc. 1933. Vol. 55. N 4. P. 1448 – 1453. DOI: 10.1021/ja01331a019</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Kaufman S., DeVoe H. Iron Analysis by Redox Titration: A General Chemistry Experiment / J. Chem. Educ. 1988. Vol. 65. N 2. P. 183. DOI: 10.1021/ed065p183</mixed-citation><mixed-citation xml:lang="en">Kubrakova I. V., Toropchenova E. S. Microwave sample preparation for geochemical and ecological studies / J. Anal. Chem. 2013. Vol. 68. N 6. P. 467 – 476. DOI: 10.1134/S1061934813060099</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Bhargava O. P., Alexiou A., Hines W. G. Rapid method for total iron determination in iron ores, sinter and related materials without use of mercury compounds / Talanta. 1978. Vol. 25. N 6. P. 357 – 358. DOI: 10.1016/0039-9140(78)80143-X</mixed-citation><mixed-citation xml:lang="en">Bhargava O. P., Alexiou A., Hines W. G. Rapid method for total iron determination in iron ores, sinter and related materials without use of mercury compounds / Talanta. 1978. Vol. 25. N 6. P. 357 – 358. DOI: 10.1016/0039-9140(78)80143-X</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Kolthoff I. M., Noponen G. E. Diphenylamine Sulfonic Acid as a Reagent for the Colorimetric Determination of Nitrates / J. Am. Chem. Soc. 1933. Vol. 55. N 4. P. 1448 – 1453. DOI: 10.1021/ja01331a019</mixed-citation><mixed-citation xml:lang="en">Kolthoff I. M., Noponen G. E. Diphenylamine Sulfonic Acid as a Reagent for the Colorimetric Determination of Nitrates / J. Am. Chem. Soc. 1933. Vol. 55. N 4. P. 1448 – 1453. DOI: 10.1021/ja01331a019</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Курбакова И. В., Торопченова Е. С. Микроволновая подготовка проб в геохимических и экологических исследованиях / Журн. аналит. химии. 2013. Т. 68. ¹ 6. С. 524 – 534. DOI: 10.7868/S0044450213060091</mixed-citation><mixed-citation xml:lang="en">Курбакова И. В., Торопченова Е. С. Микроволновая подготовка проб в геохимических и экологических исследованиях / Журн. аналит. химии. 2013. Т. 68. ¹ 6. С. 524 – 534. DOI: 10.7868/S0044450213060091</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>
