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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">10.29235/1561-8331-2021-57-1-33-40</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-629</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>Катионные красители и их использование для количественного экстракционно-фотометрического определения высших карбоновых кислот</article-title><trans-title-group xml:lang="en"><trans-title>Cationic dyes and their use for the quantitative extraction-photometric determination of higher carboxylic acids</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>Жилко</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhylko</surname><given-names>V. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жилко Вячеслав Владимирович - кандидат химических наук, доцент, декан.ул. Долгобродская, 23, 220070, Минск.</p></bio><bio xml:lang="en"><p>Viachaslau U. Zhylko - Ph. D. (Chemistry), Associate Professor, Dean of the Faculty of Environmental Monitoring, International Sakharov Environmental Institute of Belarusian State University.23, Dolgobrodskaya Str., 220070, Minsk.</p></bio><email xlink:type="simple">zhylko@tut.by</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>Нехань</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nekhan</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нехань Наталья Викторовна - магистр химических наук, аспирант, преподаватель кафедры химии.пр. Независимости, 4, 220030, Минск.</p></bio><bio xml:lang="en"><p>Natalia V. Nekhan - M. Sc. (Chemistry), postgraduate student of the Department of Analytical Chemistry of Belarusian State University; Lecturer of the Department of Chemistry, Belarusian State Pedagogical University named after Maxim Tank.4, Nezavisimosti Ave., 220030, Minsk.</p></bio><email xlink:type="simple">n.klimashevich@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Международный государственный экологический институт им. А.Д. Сахарова Белорусского государственного университета</institution></aff><aff xml:lang="en"><institution>International Sakharov Environmental Institute of Belarusian State University</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>09</day><month>02</month><year>2021</year></pub-date><volume>57</volume><issue>1</issue><fpage>33</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Жилко В.В., Нехань Н.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Жилко В.В., Нехань Н.В.</copyright-holder><copyright-holder xml:lang="en">Zhylko V.U., Nekhan N.V.</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/629">https://vestichem.belnauka.by/jour/article/view/629</self-uri><abstract><p>Исследованы катионные красители различной природы с целью подбора устойчивого в сильнощелочных условиях красителя применимого для количественного экстракционно-фотометрического определения высших карбоновых кислот. Экспериментально подобраны значения рН и состав растворителя, изучено влияние длины углеводородного радикала карбоновых кислот и значения рН водной фазы на экстракцию ионных ассоциатов высших карбоновых кислот с катионным красителем пиронином G. Количественно обоснована возможность применения данного катионного красителя в качестве эффективного реагента для количественного экстракционно-фотометрического определения высших карбоновых кислот.</p></abstract><trans-abstract xml:lang="en"><p>Cationic dyes of various natures have been investigated in order to select a dye that is stable under strongly alkaline conditions and applicable for the quantitative extraction-photometric determination of higher carboxylic acids. The nature of the dye, solvent, the length of the hydrocarbon radical of carboxylic acids and the pH of the aqueous phase for the extraction of ionic associates of higher carboxylic acids with cationic dye with pyronin G were experimentally studied. The study substantiates the practical application of the cationic dye pyronin G as an effective reagent for the quantitative extraction-photometric determination of higher carboxylic acids.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>экстракция</kwd><kwd>пиронин G</kwd><kwd>экстракционно-фотометрическое определение</kwd><kwd>карбоновые кислоты</kwd><kwd>катионные красители</kwd></kwd-group><kwd-group xml:lang="en"><kwd>extraction</kwd><kwd>pyronin G</kwd><kwd>extraction-photometric determination</kwd><kwd>carboxylic acids</kwd><kwd>cationic dyes</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">Simultaneous determination of monofluoroacetate, difluoroacetate and trifluoroacetate in environmental samples by ion chromatography / F. Wang [et al.] // J. of Chromatography. 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