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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Analytical Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Analytical Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал аналитической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-4502</issn><issn publication-format="electronic">3034-512X</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">650232</article-id><article-id pub-id-type="doi">10.31857/S0044450224040035</article-id><article-id pub-id-type="edn">vbilru</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Chemical sample preparation of plant materials in tunnel-type microwave digestion systems for elemental analysis</article-title><trans-title-group xml:lang="ru"><trans-title>Химическая пробоподготовка растительных материалов в системах микроволнового разложения туннельного типа для элементного анализа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shabanova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Шабанова</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shev@igc.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zak</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Зак</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shev@igc.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vasil’eva</surname><given-names>I. E.</given-names></name><name xml:lang="ru"><surname>Васильева</surname><given-names>И. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shev@igc.irk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vinogradov Institute of Geochemistry, Siberian Branch, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт геохимии им. А.П. Виноградова Сибирского отделения Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-04-14" publication-format="electronic"><day>14</day><month>04</month><year>2024</year></pub-date><volume>79</volume><issue>4</issue><fpage>332</fpage><lpage>351</lpage><history><date date-type="received" iso-8601-date="2025-01-31"><day>31</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://archivog.com/0044-4502/article/view/650232">https://archivog.com/0044-4502/article/view/650232</self-uri><abstract xml:lang="en"><p>Analyzing plant materials is essential for environmental monitoring, analytical control of food products, and medicinal raw materials. A review of global practices has shown that there are still no standard proceedings for chemical sample preparation suitable for all plant types without restrictions on the range of elements determined. Creating a standardized scheme for plants is feasible, as the macro composition of any plants consists of at least 90% organic compounds (cellulose, protein, lipids, etc.), whose mineralization results in the formation of water and a gaseous phase. In this study, certified plant samples were mineralized in a tunnel-type microwave digestion system MultiVIEW (SPC SCIENCE, Canada) with variations in analytical sample sizes, composition and volume of reagents, options for adding the reaction mixture, and vessel heating modes for simultaneous determination of a wide range of elements using inductively coupled plasma atomic emission spectrometry. The completeness of dissolution (the degree of correspondence between found and certified contents) was used as one of the criteria for the optimality of sample preparation conditions. It was shown that with a three-stage heating regime of the vessels (heating rate at the first stage 2.76 <sup>о</sup>C/min) with a sample weight of 0.5 g and separate sequential addition of the reaction mixture (4 ml HNO<sub>3</sub>, 1.5 ml H<sub>2</sub>O<sub>2</sub>, 1 ml HCl, and 0.05 ml HF), it is possible to reliably determine typical plant contents of Si, Al, Mg, Ca, Fe, Na, K, Ba, Sr, Rb, P, B, Mn, Ti, Ni, V, Cu, Zn.</p></abstract><trans-abstract xml:lang="ru"><p>Анализ растительных материалов необходим при экологическом мониторинге, аналитическом контроле продуктов питания и лекарственного сырья. Изучение мирового опыта показало, что до сих пор отсутствуют единые схемы химической пробоподготовки, одновременно пригодные для всех типов растений без ограничения круга определяемых элементов. Создание унифицированной схемы пробоподготовки растений возможно, так как макросостав любых растений представлен не менее чем на 90 мас. % органическими соединениями (клетчатка, белок, липиды и др.), минерализация которых приводит к образованию воды и газовой фазы. В данной работе сертифицированные образцы растений минерализованы в системе микроволнового разложения туннельного типа MultiVIEW (SPC SCIENCE, Канада) при вариациях аналитических навесок, состава и объема реагентов, вариантов добавления реакционной смеси, режимов нагрева сосудов для одновременного определения широкого круга элементов методом атомно-эмиссионной спектрометрии с индуктивно связанной плазмой. Оценка полноты растворения (степень соответствия найденных и аттестованных содержаний) использована в качестве одного из критериев оптимальности условий пробоподготовки. Показано, что при трёхступенчатом режиме нагрева сосудов (скорость нагрева на первой ступени 2.76 <sup>о</sup>С/мин) с навеской 0.5 г и раздельно-последовательном добавлением реакционной смеси (HNO<sub>3</sub> 4 мл, H<sub>2</sub>O<sub>2</sub> 1.5 мл, HCl 1 мл и HF 0.05 мл) возможно надёжное определение типичных для растений содержаний Si, Al, Mg, Ca, Fe, Na, K, Ba, Sr, Rb, P, B, Mn, Ti, Ni, V, Cu, Zn.</p></trans-abstract><kwd-group xml:lang="en"><kwd>plant materials</kwd><kwd>tunnel-type microwave digestion system</kwd><kwd>elemental analysis</kwd><kwd>inductively coupled plasma atomic emission spectrometry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>растительные материалы</kwd><kwd>система микроволнового разложения туннельного типа</kwd><kwd>элементный анализ</kwd><kwd>атомно-эмиссионная спектрометрия с индуктивно связанной плазмой</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>0284-2021-0005</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Васильева И.Е., Шабанова Е.В. 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