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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">10.29235/1561-8331-2018-54-2-245-249</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-327</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>ТЕХНИЧЕСКАЯ ХИМИЯ И ХИМИЧЕСКАЯ ТЕХНОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL CHEMISTRY AND CHEMICAL ENGINEERING</subject></subj-group></article-categories><title-group><article-title>ОПРЕДЕЛЕНИЕ СОДЕРЖАНИЯ Na-КАРБОКСИМЕТИЛЦЕЛЛЮЛОЗЫ  И ПОЛИАКРИЛАМИДА В ИХ СОВМЕСТНОМ РАСТВОРЕ</article-title><trans-title-group xml:lang="en"><trans-title>METHOD OF DETERMINING Na-CARBOXYMETHYLCELLULOSE AND POLYACRYLAMIDE CONCENTRATIONS IN THEIR JOINT SOLUTION</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>Топчий</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Topchyi</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Топчий Иван Александрович – мл. науч. сотрудник.</p><p>ул. Сурганова, 9/1, 220072, Минск.</p></bio><bio xml:lang="en"><p>Ivan A. Topchyi – Junior researcher.</p><p>9/1, Surganov Str., 220072, Minsk.</p></bio><email xlink:type="simple">itopchyi@gmail.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>Лабкович</surname><given-names>О. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Labkovich</surname><given-names>O. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лабкович Ольга Николаевна – мл. науч. сотрудник.</p><p>ул. Сурганова, 9/1, 220072, Минск.</p></bio><bio xml:lang="en"><p>Olga N. Labkovich – Junior researcher.</p><p>9/1, Surganov Str., 220072, Minsk.</p></bio><email xlink:type="simple">lab117@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>Шевчук</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shauchuk</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шевчук Вячеслав Владимирович – член-корреспондент, д-р хим. наук, зав. отделом минеральных удобрений.</p><p>ул. Сурганова, 9/1, 220072, Минск.</p></bio><bio xml:lang="en"><p>Viacheslav V. Shauchuk – Corresponding Member, D. Sc. (Chemistry), Head of the Department.</p><p>9/1, Surganov Str., 220072, Minsk.</p></bio><email xlink:type="simple">shevchukslava@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт общей и неорганической химии Национальной академии наук Беларуси.</institution></aff><aff xml:lang="en"><institution>Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus.</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>24</day><month>06</month><year>2018</year></pub-date><volume>54</volume><issue>2</issue><fpage>245</fpage><lpage>249</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Топчий И.А., Лабкович О.Н., Шевчук В.В., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Топчий И.А., Лабкович О.Н., Шевчук В.В.</copyright-holder><copyright-holder xml:lang="en">Topchyi I.A., Labkovich O.N., Shauchuk V.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/327">https://vestichem.belnauka.by/jour/article/view/327</self-uri><abstract><p>Предложен метод определения индивидуальных концентраций Na-КМЦ и ПАА в их совместном растворе. Показано, что разработанный видоизмененный метод Кьельдаля позволяет определить концентрацию ПАА. Установлено, что показатель преломления совместного раствора хорошо коррелирует с концентрацией Na-КМЦ и может использоваться для ее количественного анализа. Проверена применимость весового метода для определения суммарной концентрации веществ.</p></abstract><trans-abstract xml:lang="en"><p>Methods of determining the individual concentrations of Na-CMC and PAA in their joint solution are studied. Modified Kjeldahl method to determine the concentration of PAA is proposed. Strong correlation of the refractive index and the concentration of Na-CMC is found. Weight method to determine common concentration is examined experimentally.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Na-карбоксиметилцеллюлоза</kwd><kwd>полиакриламид</kwd><kwd>концентрация</kwd><kwd>показатель преломления</kwd><kwd>титрование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Na-carboxymethylcellulose</kwd><kwd>polyacrylamide</kwd><kwd>concentration</kwd><kwd>refractive index</kwd><kwd>titration</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">Preparation and flocculation properties of carboxymethylcellulose-graft-polyacrylamide / T. Cai [et al.] // Nanjing Daxue Xuebao. – 2013. – Vol. 49, N. 4. – P. 500–505.</mixed-citation><mixed-citation xml:lang="en">Cai T., Yang Z., Lind H., Yang H., Li A., Cheng R. Preparation and flocculation properties of carboxymethylcellulose-graft-polyacrylamide. 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