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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">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2021-57-2-177-184</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-647</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>АНАЛИТИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYTICAL CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>Экстракция лекарственных соединений класса бензодиазепинов из водных растворов и их последующее газохроматографическое определение</article-title><trans-title-group xml:lang="en"><trans-title>Extraction of medicinal compounds of the benzodiazepines class from aqueous solutions and their following gas chromatographic determination</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>Михнюк</surname><given-names>О. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhniuk</surname><given-names>O. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Николаевна Михнюк – гл. эксперт тамож. лаб.; аспирант. Белорусский государственный университет  </p><p>ул. Могилевская, 45/4, 220007, Минск</p><p>ул. Ленинградская, 14, 220050, Минск </p></bio><bio xml:lang="en"><p>Olga N. Mikhniuk – Chief expert of the Customs laboratory; Postgraduate student. Belarusian State University</p><p>45/4, Mogilevskaya Str., 220007, Minsk</p><p>14, Leningradskaya Str., 220050, Minsk </p></bio><email xlink:type="simple">mikhniuk.volha@yahoo.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>Лещев</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Leshchev</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Михайлович Лещев – д-р хим. наук, профессор</p><p>ул. Ленинградская, 14, 220050, Минск</p></bio><bio xml:lang="en"><p>Sergei M. Leschev – D. Sc. (Chemistry), Professor</p><p>14, Leningradskaya Str., 220050, Minsk </p></bio><email xlink:type="simple">leschev.sergey54@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Государственный институт повышения квалификации и переподготовки кадров таможенных органов Республики Беларусь</institution></aff><aff xml:lang="en"><institution>State Institute of Advanced Training and Retraining of Customs Authorities of the Republic of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>03</day><month>06</month><year>2021</year></pub-date><volume>57</volume><issue>2</issue><fpage>177</fpage><lpage>184</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Михнюк О.Н., Лещев С.М., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Михнюк О.Н., Лещев С.М.</copyright-holder><copyright-holder xml:lang="en">Mikhniuk O.N., Leshchev S.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://vestichem.belnauka.by/jour/article/view/647">https://vestichem.belnauka.by/jour/article/view/647</self-uri><abstract><p>В экстракционных системах гексан–вода, гексан–водные растворы неорганических солей (хлорид натрия, гидрофосфат калия и карбонат калия), хлороформ–вода с использованием метода газовой хроматографии масс-спектрометрии определены константы распределения психотропных веществ (лекарственных препаратов), ограниченных к перемещению через таможенную границу Республики Беларусь (альпразолама, лоразепама, темазепама), и лекарственного препарата клозапина, который разрешен к перемещению. Наибольшая динамика роста константы распределения от концентрации соли наблюдалась у альпразолама. Найдено, что замена гексана на хлороформ приводит к росту констант распределения и количественному извлечению всех веществ. Однако для селективного извлечения веществ из различных объектов и одновременного удаления матричных компонентов необходимо использовать системы: гексан–водные растворы солей либо гексан–вода. На основании полученных величин констант распределения веществ предложены экстракционно-хроматографические методики определения органических неэлектролитов (бензодиазепинов) в различных объектах. Метрологические характеристики методик: относительное стандартное отклонение не превышает 2 %, диапазон определяемых концентраций в растворах: 0,05–1,00 г/дм3.</p></abstract><trans-abstract xml:lang="en"><p>In extraction systems hexane–water, hexane–aqueous solutions of inorganic salts (sodium chloride, dipotassium phosphate and potassium carbonate), chloroform–water using the method of gas chromatography–mass spectrometry, the distribution constants of psychotropic substances, limited to movement through the customs border of the Republic of Belarus – alprazolam, lorazepam, temazepam, and as well as clozapine, a medicinal product permitted for movement, were determined. The greatest dynamics of the growth of the distribution constant versus salt concentration was observed in alprazolam. It was found that replacing hexane with chloroform leads to increasing the distribution constants and the quantitative extraction of all substances. However, for the selective extraction of substances from various objects and the simultaneous removal of matrix components, it is necessary to use the systems as hexane–aqueous solutions of salts or hexane–water. Based on the obtained values of the distribution constants of substances, extraction-chromatographic technique for the determination of organic non­electrolytes (benzodiazepines) in various objects is proposed. Metrological characteristics of the techniques are: relative standard deviation does not exceed 2 %, the range of determined concentrations in solutions is 0,05– 1,00 g/dm3.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>константа распределения</kwd><kwd>высаливание</kwd><kwd>экстракционно­хроматографические методики</kwd><kwd>бензодиазепины</kwd><kwd>психотропные вещества</kwd></kwd-group><kwd-group xml:lang="en"><kwd>distribution constant</kwd><kwd>salting out</kwd><kwd>extraction-chromatographic techniques</kwd><kwd>benzodiazepines</kwd><kwd>psychotropic substances</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">Recommended methods for the identification and analysis of barbiturates and benzodiazepines under international control: manual for use by national drug analysis laboratories [Electronic Resource]. – New York: UN, 2012. – Mode of access: https://www.unodc.org/documents/scientific/barbiturates_and_benzodiazepines.pdf</mixed-citation><mixed-citation xml:lang="en">Recommended methods for the identification and analysis of barbiturates and benzodiazepines under international control: manual for use by national drug analysis laboratories. 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