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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-2426</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>Спектрофотометрическое определение дезидустата: образование йодных комплексов и тест на однородность</article-title><trans-title-group xml:lang="en"><trans-title>Spectrophotometric Estimation of Desidustat: Complex Formation with Iodine and Content Uniformity Test</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>Alqarni</surname><given-names>M.</given-names></name><name name-style="western" xml:lang="en"><surname>Alqarni</surname><given-names>Mohammed</given-names></name></name-alternatives><bio xml:lang="ru"><p>Таиф</p></bio><bio xml:lang="en"><p>Taif </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Фармацевтический колледж, Тайфский университет</institution><country>Саудовская Аравия</country></aff><aff xml:lang="en"><institution>Department of Pharmaceutical Chemistry, College of Pharmacy,  &#13;
Taif University</institution><country>Saudi Arabia</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>729</fpage><lpage>729</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Alqarni M., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Alqarni M.</copyright-holder><copyright-holder xml:lang="en">Alqarni 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/2426">https://zhps.ejournal.by/jour/article/view/2426</self-uri><abstract><p>Разработан эффективный спектрофотометрический метод количественного определения дезидустата в фармацевтических препаратах с использованием молекулярного йода в качестве комплексообразующего агента. Дезидустат, ингибитор пролилгидроксилазы, используемый для лечения анемии, проанализирован на основе взаимодействия йода со вторичной аминной группой, где координация происходит через неподеленную пару электронов, что приводит к образованию стабильного комплекса гипериодина. Образовавшийся окрашенный ионно-парный комплекс демонстрирует отчетливый гиперхромный сдвиг с максимумом поглощения при 235 нм. Предложенный метод валидирован в соответствии с рекомендациями Международного совета по гармонизации. Метод продемонстрировал линейность в диапазоне концентраций 0.25–1.0 мкг/л с коэффициентом корреляции (r²) 0.9995. Пределы обнаружения и количественного определения 0.00459 и 0.01378 мкг/л, что указывает на высокую чувствительность. Прецизионность метода подтверждена внутри- и междневными исследованиями со средними степенями извлечения 100.38 и 100.22%. Исследования точности показали удовлетворительные результаты со средним процентом извлечения от 99.41 до 99.87%. Метод пригоден для рутинного анализа дезидустата в фармацевтических лекарственных формах и представляет собой альтернативу более сложным аналитическим методам.</p></abstract><trans-abstract xml:lang="en"><p>A simple, sensitive, and cost-effective spectrophotometric method was developed for the quantitative determination of desidustat in pharmaceutical formulations, using molecular iodine as a complexing agent. Desidustat, a hypoxia-inducible factor prolyl hydroxylase inhibitor used to treat anaemia, was analyzed based on the interaction between iodine and a secondary amine group, where coordination occurs through the lone pair of electrons, resulting in the formation of a stable hyperiodine complex. The resulting coloured ion-pair complex exhibited a distinct hyperchromic shift, with maximum absorbance at 235 nm. The proposed method was validated in accordance with the International Council for Harmonisation guidelines. The method demonstrated excellent linearity over the concentration range of 0.25–1.0 μg/L, with a correlation coefficient (r²) of 0.9995. The limits of detection and quantitation were 0.00459 and 0.01378 μg/L, respectively, indicating high sensitivity. Method precision was confirmed through intra- and inter-day studies, yielding mean recovery values of 100.38 and 100.22%, respectively. Accuracy studies showed satisfactory results, with mean percentage recoveries ranging from 99.41 to 99.87%. The validated method was reliable, precise, and suitable for the routine analysis of desidustat in pharmaceutical dosage forms, offering a straightforward alternative to more complex analytical techniques.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дезидустат</kwd><kwd>УФ-видимая спектрофотометрия</kwd><kwd>валидация</kwd><kwd>тест на однородность</kwd><kwd>йод</kwd></kwd-group><kwd-group xml:lang="en"><kwd>desidustat</kwd><kwd>UV-Vis spectrophotometry</kwd><kwd>validation</kwd><kwd>content uniformity test</kwd><kwd>iodine</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">The authors would like to acknowledge the Deanship of Graduate Studies and Scientific Research, Taif University for funding this work.</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">D. Banerjee, S. Sharma, B. Chatterjee, J. Pharm. 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