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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">kurskvest</journal-id><journal-title-group><journal-title xml:lang="ru">Человек и его здоровье</journal-title><trans-title-group xml:lang="en"><trans-title>Humans and their health</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1998-5746</issn><issn pub-type="epub">1998-5754</issn><publisher><publisher-name>Kursk State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21626/vestnik/2022-1/07</article-id><article-id custom-type="elpub" pub-id-type="custom">kurskvest-995</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>ФАРМАЦЕВТИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACEUTICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>Разработка методики химико-токсикологического анализа рифабутина в объектах биологического происхождения</article-title><trans-title-group xml:lang="en"><trans-title>Development of methods of chemical and toxicological analysis of Rifabutin in objects of biological origin</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8195-2852</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коновалова</surname><given-names>Светлана Сергеевна</given-names></name><name name-style="western" xml:lang="en"><surname>Konovalova</surname><given-names>Svetlana S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>соискатель кафедры фармацевтической и токсикологической химии, ИГМУ, г. Иркутск</p></bio><bio xml:lang="en"><p>PhD applicant of the Department of Pharmaceutical and Toxicological Chemistry, ISMU, Irkutsk, Russian Federation</p></bio><email xlink:type="simple">svetlanakonovalova987@yandex.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/0000-0002-3281-9489</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Илларионова</surname><given-names>Елена Анатольевна</given-names></name><name name-style="western" xml:lang="en"><surname>Illarionova</surname><given-names>Elena A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р хим. наук, профессор, зав. кафедрой фармацевтической и токсикологической химии, ИГМУ, г. Иркутск</p></bio><bio xml:lang="en"><p>Dr. Sci. (Chem.), Professor, Head of the Department of Pharmaceutical and Toxicological Chemistry, ISMU, Irkutsk, Russian Federation</p></bio><email xlink:type="simple">illelena24@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский государственный медицинский университет (ИГМУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk State Medical University (ISMU)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>29</day><month>03</month><year>2022</year></pub-date><volume>25</volume><issue>1</issue><fpage>54</fpage><lpage>61</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коновалова С.С., Илларионова Е.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Коновалова С.С., Илларионова Е.А.</copyright-holder><copyright-holder xml:lang="en">Konovalova S.S., Illarionova E.A.</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.kursk-vestnik.ru/jour/article/view/995">https://www.kursk-vestnik.ru/jour/article/view/995</self-uri><abstract><p>Цель: разработка методики изолирования и идентификации рифабутина для химико-токсикологического анализа из биологического материала. Материалы и методы. Для анализа использовали субстанцию рифабутина, капсулы «Фарбутин», содержащие рифабутина 150 мг, спирт этиловый 95%, хлористоводородной кислоты раствор 0,1 М, натрия гидроксида раствор 0,1 М, воду очищенную, аммиака раствор 10%, растворы аммония сульфата 20%, аммония сульфата насыщенный, натрия сульфата 5%, натрия сульфата насыщенный, натрия хлорида 20%, натрия хлорида насыщенный. Органические растворители: бензол, дихлорметан, диэтиловый эфир, толуол, хлороформ, этилацетат. Определение рН проводили с помощью универсального ионометра Ит-1101. Изолирование проводили методом жидкость-жидкостной экстракции, обнаружение и количественное определение - спектрофотометрическим методом в ультрафиолетовой области. Измерение оптической плотности проводили на спектрофотометре СФ-2000 в кюветах с толщиной слоя 1 см. Результаты. В ходе исследования были изучены оптические свойства рифабутина, спектры поглощения, характеризующиеся двумя полосами поглощения при 231±2 нм и 279±2 нм, определены оптимальные растворители спирт этиловый 95% и хлористоводородной кислоты раствор 0,1 М, концентрация 0,002%. Экспериментально изучено влияние различных факторов на экстракцию рифабутина из водных растворов. Наибольшая степень извлечения достигается дихлорметаном при рН 2, в присутствии натрия хлорида насыщенного раствора, однократно в течение 3 минут. Заключение. Разработаны методики изолирования и количественного определения рифабутина методом УФ-спектрофотометрии в извлечениях из биологических жидкостей и органов.</p></abstract><trans-abstract xml:lang="en"><p>Objective: to develop a technique for isolating and identifying rifabutin for chemical and toxicological analysis from biological material. Materials and methods. The substance rifabutin, capsules Farbutin containing rifabutin 150 mg, ethyl alcohol 95%, hydrochloric acid solution 0.1 M, sodium hydroxide solution 0.1 M, purified water, ammonia solution 10%, solutions of ammonium sulfate 20%, ammonium sulfate saturated, sodium sulfate 5%, sodium sulfate saturated, sodium chloride 20%, sodium chloride saturated were used for analysis. Organic solvents: benzene, dichloromethane, diethyl ether, toluene, chloroform, ethyl acetate. The pH was determined using a universal ionometer It-1101. Isolation was carried out by liquid-liquid extraction, detection and quantification by spectrophotometric method in the ultraviolet region. The optical density was measured using a SF-2000 spectrophotometer in cuvettes with a layer thickness of 1 cm. Results. In the course of the study, the optical properties of rifabutin, and absorption spectra characterized by two absorption bands at 231±2 nm and 279±2 nm were studied, ethyl alcohol 95% and hydrochloric acid solution 0.1 M, concentration 0.002% as optimal solvents were determined. The effect of various factors on the extraction of rifabutin from aqueous solutions has been experimentally studied. The highest degree of extraction is achieved by dichloromethane at pH 2, in the presence of sodium chloride saturated solution, once for 3 minutes. Conclusion. Methods of isolation and quantitative determination of rifabutin by UV spectrophotometry in extracts from biological fluids and organs have been developed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рифабутин</kwd><kwd>жидкость-жидкостная экстракция</kwd><kwd>биологические объекты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rifabutin</kwd><kwd>liquid-liquid extraction</kwd><kwd>biological objects</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">Государственная фармакопея Российской Феде-рации. XIV издание. Том I. Москва: Федеральная электронная медицинская библиотека. 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