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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-2359</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>УФ-спектрофотометрический метод для одновременного определения лоратадина и псевдоэфедрина в таблетках</article-title><trans-title-group xml:lang="en"><trans-title>Smart UV Spectrophotometric Method for the Simultaneous Determination of Loratadine and Pseudoephedrine in Tablets</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>Abu Reid</surname><given-names>I. O.</given-names></name><name name-style="western" xml:lang="en"><surname>Abu Reid</surname><given-names>I. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хартум </p></bio><bio xml:lang="en"><p>Khartoum </p></bio><email xlink:type="simple">iabureid@hotmail.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>Mohamed</surname><given-names>A. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Mohamed</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Омдурман </p></bio><bio xml:lang="en"><p>Omdurman </p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Hussain</surname><given-names>M. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Hussain</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хартум </p></bio><bio xml:lang="en"><p>Khartoum </p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Международный университет Африки</institution><country>Судан</country></aff><aff xml:lang="en"><institution>Department of Pharmaceutical Chemistry, Faculty of Pharmacy, International University of Africa</institution><country>Sudan</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Фармацевтический колледж, Университет Карари</institution><country>Судан</country></aff><aff xml:lang="en"><institution>Department of Pharmaceutical Chemistry, College of Pharmacy, Karary University</institution><country>Sudan</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Кафедра фармацевтической микробиологии, Международный университет Африки</institution><country>Судан</country></aff><aff xml:lang="en"><institution>Department of Pharmaceutical Microbiology, Faculty of Pharmacy, International University of Africa</institution><country>Sudan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>08</day><month>09</month><year>2026</year></pub-date><volume>93</volume><issue>4</issue><fpage>578</fpage><lpage>8</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Abu Reid I., Mohamed A., Hussain M., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Abu Reid I., Mohamed A., Hussain M.</copyright-holder><copyright-holder xml:lang="en">Abu Reid I., Mohamed A., Hussain 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://zhps.ejournal.by/jour/article/view/2359">https://zhps.ejournal.by/jour/article/view/2359</self-uri><abstract><p>Разработан спектрофотометрический метод для одновременного определения псевдоэфедрина (PSE) и лоратадина (LOR) в чистом виде и таблетках, который позволил устранить спектральные помехи от LOR на длине волны, необходимой для определения PSE. Псевдоэфедрин можно определять в присутствии лоратадина, используя две длины волны (257 и 280 нм). Для анализа построены две калибровочные кривые: первая — для количественного определения LOR в смеси на основе его поглощения при 280 нм, вторая — для определения отношения концентраций (CR) между компонентами при 257 нм. Эта кривая получена путем построения графика отношения поглощения в зависимости от отношения концентраций, определяемого как CR = [PSE]/[LOR]. Рассчитана концентрация PSE: [PSE] = CREXP × [LOR]. Разработанный аналитический метод статистически валидирован в соответствии с рекомендациями ICH Q2, получены удовлетворительные результаты: 99.97 ± 0.71% и 101.10 ± 1.32% для PSE и LOR. Предложенный метод подходит для рутинного анализа контроля качества таблетированных лекарственных форм, его достоверность подтверждена статистическим сравнением результатов с данными, полученными с помощью эталонного хроматографического метода.</p></abstract><trans-abstract xml:lang="en"><p>A simple, accurate, and precise spectrophotometric method has been developed for the simultaneous determination of pseudoephedrine (PSE) and loratadine (LOR) in bulk and tablets. The method principally exploits the spectral characteristics of the two compounds to affect mathematical manipulation of Beer’s law. The approach in this method enabled the removal of the spectral interference from LOR at the wavelength for the determination of PSE. It was possible to determine pseudoephedrine in the presence of loratadine using two wavelengths (257 and 280 nm). Two calibration curves were established for the analysis. The first was constructed to quantify LOR in the mixture on the basis of its absorbance at 280 nm. The second calibration curve was developed to determine the concentration ratio (CR) between the components at 257 nm. This curve was obtained by plotting the absorbance ratio (AR) against the concentration ratio, defined as CR = [PSE]/[LOR]. The concentration of PSE was calculated using the equation: [PSE] = CREXP × [LOR]. The developed analytical method was statistically validated in accordance with ICH Q2 guidelines and yielded satisfactory results. The assay results, expressed as a percentage of the labeled claim, were found to be 99.97 ± 0.71% and 101.10 ± 1.32% for PSE and LOR, respectively. These findings demonstrate that the proposed method is suitable for routine quality control analysis of tablet formulations. The validity of the proposed method was confirmed through statistical comparison of the data with those obtained by a reference chromatographic method.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лоратадин</kwd><kwd>псевдоэфедрин</kwd><kwd>комбинация</kwd><kwd>таблетки</kwd><kwd>спектрофотометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>loratadine</kwd><kwd>pseudoephedrine</kwd><kwd>combination</kwd><kwd>tablets</kwd><kwd>spectrophotometry</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">S. C. Sweetman, Martindale: The Complete Drug Reference, 37th ed., London, Pharmaceutical Press (2011).</mixed-citation><mixed-citation xml:lang="en">S. C. 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