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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">10.26896/1028-6861-2025-91-5-5-9</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2488</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>Влияние муравьиной кислоты как модификатора подвижной фазы на удерживание маркеров мертвого времени в обращенно-фазовой высокоэффективной жидкостной хроматографии</article-title><trans-title-group xml:lang="en"><trans-title>The impact of formic acid as a mobile phase additive on the retention of dead time markers in reversed-phase high-performance liquid chromatography</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>Гриневич</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Grinevich</surname><given-names>O. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Оксана Игоревна Гриневич</p><p>119071, Москва, Ленинский просп., д. 31, корп. 4</p></bio><bio xml:lang="en"><p>Oksana I. Grinevich</p><p>31-4, Leninsky prosp., Moscow, 119071</p></bio><email xlink:type="simple">oksigrinevich@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>Байгильдиев</surname><given-names>Т. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Baygildiev</surname><given-names>T. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тимур Муратович Байгильдиев</p><p>119071, Москва, Ленинский просп., д. 31, корп. 4</p><p>119571, Москва, просп. Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Timur M. Baygildiev</p><p>31-4, Leninsky prosp., Moscow, 119071</p><p>86, Vernadsky prosp., Moscow, 119571</p></bio><email xlink:type="simple">oksigrinevich@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физической химии и электрохимии им. А. Н. Фрумкина Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Frumkin Institute of Physical Chemistry and Electrochemistry 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 физической химии и электрохимии им. А. Н. Фрумкина Российской академии наук; МИРЭА - Российский технологический университет (Институт тонких химических технологий им. М. В. Ломоносова),</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences; MIREA - Russian Technological University (Lomonosov Institute of Fine Chemical Technologies)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>05</month><year>2025</year></pub-date><volume>91</volume><issue>5</issue><fpage>5</fpage><lpage>9</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гриневич О.И., Байгильдиев Т.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Гриневич О.И., Байгильдиев Т.М.</copyright-holder><copyright-holder xml:lang="en">Grinevich O.I., Baygildiev T.M.</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/2488">https://www.zldm.ru/jour/article/view/2488</self-uri><abstract><p>Изучено влияние муравьиной кислоты в качестве добавки в подвижную фазу на время удерживания пяти соединений (нитрит натрия, йодид калия, ацетон, урацил, щавелевая кислота), выбранных в качестве маркеров мертвого времени, в обращенно-фазовой высокоэффективной жидкостной хроматографии (ОФ ВЭЖХ) с использованием октадецилсиликагеля (ОДС) как неподвижной фазы. Было показано, что все изученные соединения слабо удерживаются на поверхности ОДС в нейтральной среде. Однако введение кислой добавки в подвижную фазу приводит к увеличению удерживания соединений, имеющих щелочную реакцию, что особенно сильно проявилось для нитрита натрия. Наименьшее время удерживания наблюдалось для щавелевой кислоты, и она может быть рекомендована в качестве маркера мертвого времени для определения слабополярных и неполярных соединений в нейтральной и кислой среде.</p></abstract><trans-abstract xml:lang="en"><p>The effect of formic acid as a mobile phase additive on the retention time of five compounds (sodium nitrite, potassium iodide, acetone, uracil, oxalic acid) selected as dead time markers was studied in reversed-phase high-performance liquid chromatography (RP HPLC). All the studied compounds were shown to have weak retention on the surface of octadecylsilica gel under neutral conditions. However, the introduction of an acidic additive to the mobile phase leads to an increase in the retention of compounds giving an alkaline reaction. This effect was particularly strong for sodium nitrite. The lowest retention time was observed for oxalic acid, and it can be recommended as a dead time marker for the analysis of weakly polar and nonpolar compounds in neutral and acidic media.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>маркер мертвого времени</kwd><kwd>время удерживания</kwd><kwd>обращенно-фазовая высокоэффективная жидкостная хроматография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>dead time marker</kwd><kwd>retention time</kwd><kwd>reversed-phase high-performance liquid chromatography</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда (проект № 22-73-10053).</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">Daignault L. G., Jackman D. C., Rillema D. P. The Case of the Elusive tm Values in HPLC / Chromatographia. 1989. Vol. 27. No. 3. P. 156 – 158. 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