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<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">10.26896/1028-6861-2026-92-2-12-19</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2725</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 парацетамола и ибупрофена в смешанном обращенно-фазовом режиме высокоэффективной жидкостной хроматографии с π-взаимодействиями при использовании неподвижной фазы с N-алкилзамещенным 2,4-динитроанилиновым селектором</article-title><trans-title-group xml:lang="en"><trans-title>Determination of Paracetamol and Ibuprofen in reversed-phase liquid chromatography mixed-mode with π-interactions using stationary phase with N-alkyl substituted 2,4-dinitroaniline selector</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>Упыренко</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Upyrenko</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгений Витальевич Упыренко</p><p>634050, г. Томск, просп. Ленина, д. 36</p></bio><bio xml:lang="en"><p>Evgeny V. Upyrenko</p><p>36, prosp. Lenina, Tomsk, 634050</p></bio><email xlink:type="simple">eugeniy.upyrenko@gmail.com</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>Кургачев</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurgachev</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Андреевич Кургачев</p><p>634050, г. Томск, просп. Ленина, д. 36</p></bio><bio xml:lang="en"><p>Dmitry A. Kurgachev</p><p>36, prosp. Lenina, Tomsk, 634050</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>Мурина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Murina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анастасия Анатольевна Мурина</p><p>634050, г. Томск, просп. Ленина, д. 36</p></bio><bio xml:lang="en"><p>Anastasia A. Murina</p><p>36, prosp. Lenina, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Томский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tomsk National Research State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>23</day><month>02</month><year>2026</year></pub-date><volume>92</volume><issue>2</issue><fpage>12</fpage><lpage>19</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Упыренко Е.В., Кургачев Д.А., Мурина А.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Упыренко Е.В., Кургачев Д.А., Мурина А.А.</copyright-holder><copyright-holder xml:lang="en">Upyrenko E.V., Kurgachev D.A., Murina A.A.</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/2725">https://www.zldm.ru/jour/article/view/2725</self-uri><abstract><p>Для разработанной неподвижной фазы AWE-241 с N-алкилзамещенным 2,4-динитроанилиновым селектором впервые продемонстрирована возможность работы в бимодальном режиме ВЭЖХ, основанном на сочетании дисперсионных взаимодействий и гидрофобного эффекта (обращенно-фазовый режим) и стэкинговых параллельно-смещенных π-взаимодействий (квазинормально-фазовый режим). Гидрофобная природа ароматического селектора, замещенного двумя нитрогруппами, позволяет работать в обращенно-фазовом режиме, а его электронодефицитный характер обеспечивает дополнительное удерживание за счет стэкинговых параллельно-смещенных π-взаимодействий, диполь-дипольных взаимодействий и взаимодействий посредством водородных связей. Подобное сочетание типов химических взаимодействий позволяет селективно определять вещества, содержащие ароматическую группу, в том числе полярные, при работе в обращенно-фазовом режиме ВЭЖХ, а также одновременно определять полярные и гидрофобные соединения с ароматической группой без необходимости градиентного элюирования. Данное преимущество AWE-241 продемонстрировано в сравнении с коммерчески доступными аналогами для работы в обращенно-фазовом режиме жидкостной хроматографии (октилсилильная и октадецилсилильная фазы), а также наиболее популярными фазами, содержащими ароматические группы (фенилгексильной, пентафторфенильной и пиренэтильной), на примере совместного определения парацетамола и ибупрофена — действующих веществ двухкомпонентного лекарственного препарата «Ибуклин». Оценены метрологические характеристики разработанной методики определения парацетамола и ибупрофена с использованием неподвижной фазы AWE-241: диапазон определяемых содержаний — от 0,02 до 0,5 мг/мл, пределы обнаружения составили 0,3 и 0,7 мкг/мл для парацетамола и ибупрофена соответственно. Правильность определения подтверждена методом добавок.</p></abstract><trans-abstract xml:lang="en"><p>For the first time, the possibility of running in a bimodal HPLC based on combination of the dispersion interactions and hydrophobic effect (reversed phase mode) and stacked parallel-displaced π-interactions (quasi-normal phase mode) for the developed stationary phase AWE-241 with an N-alkyl-substituted 2,4-dinitroaniline selector is demonstrated. Hydrophobic nature of the aromatic selector substituted with two nitro-groups allows it to run in reversed-phase mode, and its electron-deficient character provides additional retention due to stacking parallel-displaced π-interactions, as well as dipole-dipole interactions and interactions via hydrogen bonds. This combination of types of chemical interactions makes it possible to selectively determine substances containing an aromatic group, including polar ones, when operating in the reverse-phase HPLC mode, as well as simultaneously determine polar and hydrophobic compounds with an aromatic group without the need for gradient elution. This advantage of AWE-241 is demonstrated in comparison with commercially available analogues for reverse-phase liquid chromatography (octylsilyl and octadecylsilyl phases), as well as the most common phases containing aromatic groups (phenylhexyl, pentafluorophenyl and pyrenethyl), using the example of simultaneous determination of Paracetamol and Ibuprofen, the active ingredients of the two-component drug «Ibuklin». The metrological characteristics of the developed method for the determination of Paracetamol and Ibuprofen using the AWE-241 stationary phase were evaluated: the range of detectable concentrations was from 0.02 to 0.5 mg/mL, the detection limits were 0.3 and 0.7 μg/mL for Paracetamol and Ibuprofen, respectively. The trueness of the determination was confirmed by the spike solutions method</p></trans-abstract><kwd-group xml:lang="ru"><kwd>парацетамол</kwd><kwd>ибупрофен</kwd><kwd>N-алкилзамещенный 2</kwd><kwd>4-динитроанилиновый селектор</kwd><kwd>ВЭЖХ</kwd><kwd>π-взаимодействия</kwd><kwd>мультимодальная хроматография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>paracetamol</kwd><kwd>ibuprofen</kwd><kwd>N-alkylsubstituted 2</kwd><kwd>4-dinitroaniline selector</kwd><kwd>reversed phased liquid chromatography</kwd><kwd>π-interactions</kwd><kwd>multimodal chromatography</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Hyde A. Chromatographic separation technologies: an overview of the bioanalysis zone survey / Bioanalysis. 2020. Vol. 12. P. 505 – 508. DOI: 10.4155/bio-2020-0111</mixed-citation><mixed-citation xml:lang="en">Hyde A. 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