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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-2429</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Разработка и валидация УФ-спектрофотометрического метода для одновременного определения феруловой и карнозиновой кислот в лекарственных препаратах</article-title><trans-title-group xml:lang="en"><trans-title>Development and Validation of a UV Spectrophotometric Method for Simultaneous Estimation of Ferulic Acid and Carnosic Acid in Bulk Drugs</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>Gahlawat</surname><given-names>K.</given-names></name><name name-style="western" xml:lang="en"><surname>Gahlawat</surname><given-names>Kushal</given-names></name></name-alternatives><bio xml:lang="ru"><p>Муллана-Амбала, Харьяна</p></bio><bio xml:lang="en"><p>Mullana-Ambala-133207, Haryana</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>Sharma</surname><given-names>Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Sharma</surname><given-names>Neelam</given-names></name></name-alternatives><bio xml:lang="ru"><p>Муллана-Амбала, Харьяна</p></bio><bio xml:lang="en"><p>Mullana-Ambala-133207, Haryana</p></bio><email xlink:type="simple">neelam.mdu@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>Singh</surname><given-names>S.</given-names></name><name name-style="western" xml:lang="en"><surname>Singh</surname><given-names>Sukhbir</given-names></name></name-alternatives><bio xml:lang="ru"><p>Муллана-Амбала, Харьяна</p></bio><bio xml:lang="en"><p>Mullana-Ambala-133207, Haryana</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Фармацевтический колледж ММ, Махариши Маркандешвар</institution><country>Индия</country></aff><aff xml:lang="en"><institution>Department of Pharmaceutics, MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University)</institution><country>India</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>09</month><year>2026</year></pub-date><volume>93</volume><issue>5</issue><fpage>732</fpage><lpage>732</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Gahlawat K., Sharma Н., Singh S., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Gahlawat K., Sharma Н., Singh S.</copyright-holder><copyright-holder xml:lang="en">Gahlawat K., Sharma N., Singh S.</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://zhps.ejournal.by/jour/article/view/2429">https://zhps.ejournal.by/jour/article/view/2429</self-uri><abstract><p>Разработан УФ-спектрофотометрический метод одновременного определения (метод Вирордта) феруловой и карнозиновой кислот в лекарственных препаратах. Оценивается поглощение при 215 нм для феруловой кислоты и при 284 нм для карнозиновой кислоты. Метод продемонстрировал линейность в диапазоне концентраций 2–14 мкг/мл для феруловой кислоты и 100–700 мкг/мл для карнозиновой кислоты с коэффициентами корреляции 0.9956 и 0.9976. Для расчета концентрации феруловой и карнозиновой кислот в неизвестных образцах получены следующие уравнения: Cфер= [A2(0.000529)–A1(0.000825)]/(–0.0000289) и Cкарн = [A1(0.059398)–A2(0.038129)]/(–0.0000289), где A1 и A2 — поглощение раствора при 215 и 284 нм. Степень извлечения феруловой и карнозиновой кислот методом добавления аналитов составила 98–102%, что указывает на точность метода. Степени извлечения в присутствии вспомогательных веществ и фитохимических соединений находятся в диапазоне  98–102%, с относительным стандартным отклонением &lt;2%, что подтверждает специфичность метода. Относительное стандартное отклонение RSD &lt; 2%, что свидетельствует об исключительной воспроизводимости и незначительной внутри- и междневной изменчивости, а также о том, что разработанный метод не подвержен влиянию изменений оборудования, межаналитической изменчивости и небольших изменений длины волны. Пределы обнаружения (LOD) и пределы количественного определения (LOQ) для феруловой кислоты 0.558 и 1.69 мкг/мл, тогда как LOD и LOQ для карнозиновой кислоты 37.31 и 113.06 мкг/мл, что демонстрирует более высокую чувствительность при обнаружении и количественном определении феруловой и карнозиновой кислот. Разработанным методом достигнута точность 101.2 и 100.69% при одновременном определении феруловой и карнозиновой кислот в образцах.</p></abstract><trans-abstract xml:lang="en"><p>This study outlines the development and validation of a simultaneous-equation method (Vierordt’s method) utilizing ultraviolet spectroscopy for the simultaneous estimation of ferulic acid and carnosic acid in bulk drugs. The technique assesses absorbance at 215 nm for ferulic acid and at 284 nm for carnosic acid. The method exhibited goodness of fit in the calibration curve in concentration ranges of 2–14 μg/mL for ferulic acid and 100–700 μg/mL for carnosic acid, with correlation coefficients of 0.9956 and 0.9976. Simultaneous equations for calculating the concentration of ferulic acid and carnosic acid in unknown samples were  CFer = [A2(0.000529)–A1(0.000825)]/(–0.0000289) and CCarn = [A1(0.059398)–A2(0.038129)]/(–0.0000289), where A1 and A2 are the absorbance of the unknown sample solution at 215 and 284 nm, respectively. The recovery of ferulic acid and carnosic acid using the spiking method was 98–102%, indicating the method's accuracy for quantitative estimation. The observed recovery values in the presence of excipients and phytochemicals remained within the 98–102% range, with RSDs &lt; 2%, confirming the method's specificity. Precision experiments demonstrated RSD values of &lt; 2%, signifying exceptional repeatability and negligible intra- and inter-day variability. The %RSD for ruggedness and robustness validation was less than 2%, indicating that the developed method remained unaffected by equipment changes, inter-analyst variability, and small wavelength variations. The limits of detection (LOD) and limits of quantification (LOQ) for ferulic acid were 0.558 and 1.69 µg/mL, respectively, whereas the LOD and LOQ for carnosic acid were 37.31 and 113.06 µg/mL, respectively, demonstrating greater sensitivity for the detection and quantification of ferulic acid and carnosic acid. The developed simultaneous equation method achieved 101.2 and 100.69% accuracy in the simultaneous estimation of ferulic acid and carnosic acid in bulk samples.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>феруловая кислота</kwd><kwd>карнозиновая кислота</kwd><kwd>метод одновременных уравнений</kwd><kwd>метод ультрафиолетовой спектроскопии</kwd><kwd>прочность</kwd><kwd>устойчивость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ferulic acid</kwd><kwd>carnosic acid</kwd><kwd>simultaneous equation method</kwd><kwd>Ultraviolet spectroscopy technique</kwd><kwd>ruggedness</kwd><kwd>robustness</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">The authors would like to thank MM College of Pharmacy, Maharishi Markandeshwar (Deemed to be University), Mullana-Ambala, Haryana, India 133207, for providing the facilities that enabled the completion of this research.</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">N. 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