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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2025-20-3-276-288</article-id><article-id custom-type="edn" pub-id-type="custom">DNWEEB</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-2264</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="en"><subject>ANALYTICAL METHODS IN CHEMISTRY AND CHEMICAL TECHNOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АНАЛИТИЧЕСКИЕ МЕТОДЫ В ХИМИИ И ХИМИЧЕСКОЙ ТЕХНОЛОГИИ</subject></subj-group></article-categories><title-group><article-title>Quantitative determination of 8-methoxypsoralene in mild dosage form by high-performance liquid chromatography</article-title><trans-title-group xml:lang="ru"><trans-title>Количественное определение 8-метоксипсоралена в мягкой лекарственной форме методом высокоэффективной жидкостной хроматографии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-8265-934X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алсайед</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Alsayed</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аднан Алсайед, инженер-технолог</p><p>кафедра биотехнологии и промышленной фармации</p><p>119454; пр-т Вернадского, д. 78; Москва</p></bio><bio xml:lang="en"><p>Adnan Alsayed, Process Engineer</p><p>Department of Biotechnology and Industrial Pharmacy</p><p>119454; 78, Vernadskogo pr.; Moscow</p></bio><email xlink:type="simple">Adnanalsayed00@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-5985-3900</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прежедромирская</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prezhedromirskaya</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анастасия Александровна Прежедромирская, инженер</p><p>кафедра биотехнологии и промышленной фармации</p><p>119454; пр-т Вернадского, д. 78; Москва</p></bio><bio xml:lang="en"><p>Anastasiya A. Prezhedromirskaya, Engineer</p><p>Department of Biotechnology and Industrial Pharmacy</p><p>119454; 78, Vernadskogo pr.; Moscow</p></bio><email xlink:type="simple">a.a.pregedromirskaya@ipt.ru.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8560-7060</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шняк</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shnyak</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елизавета Александровна Шняк, к. фарм. н., доцент</p><p>кафедра биотехнологии и промышленной фармации</p><p>119454; пр-т Вернадского, д. 78; Москва</p><p>ResearсherID H-9402-2013</p></bio><bio xml:lang="en"><p>Elizaveta A. Shnyak, Can. Sci. (Pharm.), Associate Professor</p><p>Department of Biotechnology and Industrial Pharmacy</p><p>119454; 78, Vernadskogo pr.; Moscow</p><p>ResearсherID H-9402-2013</p></bio><email xlink:type="simple">elizaweta__@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2610-8493</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кедик</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kedik</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Станислав Анатольевич Кедик, д. т. н., профессор, заведующий кафедрoй</p><p>кафедра биoтexнoлoгии и пpoмышлeннoй фapмaции</p><p>119454; пр-т Вернадского, д. 78; Москва</p><p>Scopus Author ID 7801632547</p></bio><bio xml:lang="en"><p>Stanislav A. Kedik, Dr. Sci. (Eng.), Professor, Head of the Department</p><p>Department of Biotechnology and Industrial Pharmacy</p><p>119454; 78, Vernadskogo pr.; Moscow</p><p>Scopus Author ID 7801632547</p></bio><email xlink:type="simple">doctorkedik@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">МИРЭА – Российский технологический университет (Институт тонких химических технологий им. М.В. Ломоносова)<country>Россия</country></aff><aff xml:lang="en">MIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>16</day><month>07</month><year>2025</year></pub-date><volume>20</volume><issue>3</issue><fpage>276</fpage><lpage>288</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Alsayed A., Prezhedromirskaya A.A., Shnyak E.A., Kedik S.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Алсайед А., Прежедромирская А.А., Шняк Е.А., Кедик С.А.</copyright-holder><copyright-holder xml:lang="en">Alsayed A., Prezhedromirskaya A.A., Shnyak E.A., Kedik S.A.</copyright-holder><license 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.finechem-mirea.ru/jour/article/view/2264">https://www.finechem-mirea.ru/jour/article/view/2264</self-uri><abstract><sec><title>   Objectives</title><p>   Objectives. To develop and validate a method for the quantitative determination of 8-methoxypsoralen in a soft dosage form in accordance with the requirements of the State Pharmacopoeia of the Russian Federation, 15th edition, and the Pharmacopoeia of the Eurasian Economic Union.</p></sec><sec><title>   Methods</title><p>   Methods. Quantitative determination of 8-methoxypsoralen was performed by high-performance liquid chromatography on a Chromaster 5000 (Hitachi, Japan) with a diode array detector. Chromatography was performed on a Kromasil EternityXT-5-C18, 5 μm, 250 × 4.6 mm column in isocratic mode with a mobile phase of acetonitrile/water in a ratio of 50 : 50 % (v/v). The flow rate was 1.0 mL/min, while the detection wavelength was 250 nm.</p></sec><sec><title>   Results</title><p>   Results. The optimal condition for the extraction of 8-methoxypsoralen was found to be ultrasonic gel extraction at 40 °C for 15 min using acetonitrile. The best peak resolution of 8-methoxypsoralen was achieved during gel analysis at 250 nm using a reversed-phase sorbent with an octadecyl phase (C18) grafted onto silica gel. The acetonitrile/water mixture was used as a mobile phase in a volume ratio of 50 : 50 % to minimize chromatography time while maintaining optimal resolution. From the validation procedures, it was confirmed that the method is specific, linear (R2 &gt; 0.997) and reproducible (relative standard deviation was ≤ 3.0 %). The accuracy of the analytical method was from 98.26 % to 101.02%, while the values of the detection and quantitative determination limits were 0.006 and 0.020 μg/mL, respectively. The developed quantitative determination method demonstrated its stability when varying as the column temperature and flow rate by ±5 %.</p></sec><sec><title>   Conclusions</title><p>   Conclusions. As effectively implemented using the high-performance liquid chromatography method, the method for quantitative determination of 8-methoxypsoralen has a number of advantages over the previously described methods, including reduced analysis time, as well as increased sensitivity and effectiveness, which makes it possible to apply the developed method in assessing the quantitative content of 8-methoxypsoralen in a soft dosage form—gel for the treatment of psoriasis.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>   Цель</title><p>   Цель. Разработка и валидация методики количественного определения 8-метоксипсоралена в мягкой лекарственной форме в соответствии с требованиями Государственной Фармакопеи Российской Федерации XV издания и Фармакопеи Евразийского экономического союза.</p></sec><sec><title>   Методы</title><p>   Методы. Количественное определение 8-метоксипсоралена проводили методом высокоэффективной жидкостной хроматографии на приборе «Chromaster 5000» (Hitachi, Япония) с диодно-матричным детектором. Хроматографирование выполняли на колонке Kromasil EternityXT-5-C18, 5 мкм, 250 × 4.6 мм в изократическом режиме с подвижной фазой ацетонитрил/вода в соотношении 50 : 50 % (об/об). Скорость потока составляла 1.0 мл/мин, длина волны детектирования — 250 нм.</p></sec><sec><title>   Результаты</title><p>   Результаты. Установлено, что экстракция активного вещества из геля под действием ультразвука при температуре 40 °C в течение 15 мин с использованием ацетонитрила является наиболее оптимальным условием для извлечения 8-метоксипсоралена. Наилучшее пиковое разрешение 8-метоксипсоралена было достигнуто при анализе геля на длине волны 250 нм с помощью обращенно-фазового сорбента с октадецильной фазой (С18), привитой к силикагелю. Использование в качестве подвижной фазы смеси ацетонитрил/вода в объемном соотношении 50 : 50 % позволило обеспечить минимальное время хроматографирования при сохранении оптимального разрешения. По данным валидационных процедур уставлено, что методика специфична, линейна (R2 &gt; 0.997) и воспроизводима (относительное стандартное отклонение составило ≤ 3.0 %). Точность аналитической методики составила от 98.26 % до 101.02 %, а значения пределов обнаружения и количественного определения — 0.006 и 0.020 мкг/мл соответственно. Разработанная методика количественного определения показала свою устойчивость при варьировании как температуры колонки, так и скорости потока на ±5 %.</p></sec><sec><title>   Выводы</title><p>   Выводы. Методика количественного определения 8-метоксипсоралена была эффективно реализована с использованием метода высокоэффективной жидкостной хроматографии и обладает рядом преимуществ по сравнению с ранее описанными методиками. Эти преимущества заключаются в сокращении времени анализа, увеличении чувствительности и эффективности, что позволяет применять разработанную методику для оценки количественного содержания 8-метоксипсоралена в мягкой лекарственной форме — геле при лечении псориаза.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>8-метоксипсорален</kwd><kwd>метоксален</kwd><kwd>8-МОП</kwd><kwd>мягкая лекарственная форма</kwd><kwd>гель</kwd><kwd>количественное определение</kwd><kwd>высокоэффективная жидкостная хроматография</kwd><kwd>валидация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>8-methoxypsoralen</kwd><kwd>methoxalen</kwd><kwd>8-MOP</kwd><kwd>mild dosage form</kwd><kwd>gel</kwd><kwd>quantitative determination</kwd><kwd>high-performance liquid chromatography</kwd><kwd>validation</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">Bishnoi A., Parsad D. 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