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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">rmjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Эталоны. Стандартные  образцы</journal-title><trans-title-group xml:lang="en"><trans-title>Measurement Standards. Reference Materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2687-0886</issn><publisher><publisher-name>D. I. Mendeleyev Institute for Metrology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20915/2077-1177-2026-22-3-51-67</article-id><article-id custom-type="edn" pub-id-type="custom">JNLNHD</article-id><article-id custom-type="elpub" pub-id-type="custom">rmjournal-610</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>Современные методы анализа веществ и материалов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Modern methods of analysis of substances and materials</subject></subj-group></article-categories><title-group><article-title>Применение метода дифференциальной сканирующей калориметрии для исследования и разработки стандартных образцов температуры фазовых переходов органических веществ на основе бензофенона, бензойной кислоты и кофеина</article-title><trans-title-group xml:lang="en"><trans-title>Application of Differential Scanning Calorimetry for the Research and Development of Reference Materials for Phase Transition Temperatures of Organic Substances Based on Benzophenone, Benzoic Acid and Caffeine</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8499-369X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шипицын</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Shipitsyn</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шипицын Артем Павлович –  ведущий инженер лаборатории термометрии и поверхностной плотности</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Artem P. Shipitsyn – Leading Engineer of the Laboratory of Thermometry and Surface Density</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">shipitsyn@uniim.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/0000-0002-8654-9189</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Непомилуев</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Nepomiluev</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Непомилуев Андрей Михайлович –  канд. хим. наук, старший научный сотрудник лаборатории термометрии и поверхностной плотности</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Andrey M. Nepomiluev – Cand. Sci, (Chem.), Senior Researcher of the Laboratory of Thermometry and Surface Density</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">nepomiluevam@uniim.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/0000-0002-2032-3427</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тюрнина</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Tyurnina</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тюрнина Анастасия Евгеньевна –  канд. физ.-мат. наук, и. о. заведующего лабораторией термометрии и поверхностной плотности</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Anasatsiya E. Tyurnina – Cand. Sci. (Phys.-Math.), Head of the Laboratory of Thermometry and Surface Density</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">turninaae@uniim.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/0000-0002-6975-7744</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Голынец</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Golynets</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Голынец Ольга Станиславовна –  и. о. заведующего лабораторией метрологии влагометрии и стандартных образцов</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Olga S. Golynets – Acting Head of the Laboratory for Metrological Support of Moisture Measurement and Reference Materials</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">golynets_olga@uniim.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/0000-0002-8008-1669</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шохина</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Shokhina</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шохина Ольга Сергеевна –  научный сотрудник лаборатории метрологии влагометрии и стандартных образцов</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Olga S. Shokhina –  Researcher of the Laboratory for Metrological Support of Moisture Measurement and Reference Materials</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">shokhinaos@uniim.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/0000-0001-8347-2633</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сергеева</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sergeeva</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергеева Анна Сергеевна –  канд. хим. наук, старший научный сотрудник лаборатории метрологии влагометрии и стандартных образцов</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Anna S. Sergeeva –  Cand. Sci. (Chem.), Senior Researcher of the Laboratory for Metrological Support of Moisture Measurement and Reference Materials</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">sergeevaas@uniim.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/0000-0003-3691-1124</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крашенинина</surname><given-names>М. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Krasheninina</surname><given-names>M. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крашенинина Мария Павловна –  канд. техн. наук, старший научный сотрудник лаборатории метрологии влагометрии и стандартных образцов</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Maria P. Krasheninina –  Cand. Sci. (Eng.), Senior Researcher of the Laboratory for Metrological Support of Moisture Measurement and Reference Materials</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">krasheninina_m@uniim.ru</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>Макарова</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarova</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Макарова Светлана Германовна –  инженер лаборатории метрологии влагометрии и стандартных образцов</p><p>620075, г. Екатеринбург, ул. Красноармейская, 4</p></bio><bio xml:lang="en"><p>Svеtlana G. Makarova – Engineer of the Laboratory for Metrological Support of Moisture Measurement and Reference Materials</p><p>4 Krasnoarmeyskaya st., Yekaterinburg, 620075</p></bio><email xlink:type="simple">makarovasg@uniim.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>УНИИМ –  филиал ФГУП «ВНИИМ им. Д. И. Менделеева»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>UNIIM –  Affiliated Branch of the D. I. Mendeleyev Institute for Metrology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>08</day><month>10</month><year>2026</year></pub-date><volume>22</volume><issue>3</issue><fpage>51</fpage><lpage>67</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шипицын А.П., Непомилуев А.М., Тюрнина А.Е., Голынец О.С., Шохина О.С., Сергеева А.С., Крашенинина М.П., Макарова С.Г., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Шипицын А.П., Непомилуев А.М., Тюрнина А.Е., Голынец О.С., Шохина О.С., Сергеева А.С., Крашенинина М.П., Макарова С.Г.</copyright-holder><copyright-holder xml:lang="en">Shipitsyn A.P., Nepomiluev A.M., Tyurnina A.E., Golynets O.S., Shokhina O.S., Sergeeva A.S., Krasheninina M.P., Makarova S.G.</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.rmjournal.ru/jour/article/view/610">https://www.rmjournal.ru/jour/article/view/610</self-uri><abstract><p>С развитием научно-технологического прогресса в сферах метрологического надзора, химической и фармацевтической промышленности особое значение приобретает обеспечение непрерывного метрологического контроля средств измерений, используемых в термическом анализе. Ключевым аспектом решения этой задачи и обеспечения прослеживаемости результатов измерений к основным единицам физических величин является высокая точность определения температур фазовых переходов, таких как плавление, кристаллизация, сублимация, каплепадение, размягчение, помутнение и других характеристических температур органических соединений.В рамках настоящего исследования была поставлена цель оценить возможность применения органических соединений на основе бензофенона, бензойной кислоты и кофеина в качестве перспективных кандидатов для создания стандартных образцов температуры фазовых переходов, обеспечивающих прослеживаемость к единице температуры (℃).Измерения температуры фазовых переходов (температуры плавления) проводились с использованием метода дифференциальной сканирующей калориметрии на термоанализаторе STA 449 F5 JUPITER, входящем в состав Государственного первичного эталона единиц массовой доли, массовой (молярной) концентрации воды в твердых и жидких веществах и материалах ГЭТ  173. Установление аттестованных значений разрабатываемых стандартных образцов выполнялось в соответствии с требованиями ГОСТ  ISO Guide 35–2015 «Общие и статистические принципы сертификации (аттестации)». В ходе работы оценены неопределенности, обусловленные неоднородностью исходных материалов, а также исследована их краткосрочная и долговременная стабильность.В результате разработки стандартных образцов установлены интервалы допускаемых значений аттестованных характеристик температуры плавления: от 47,0 до 50,0 ℃ –  для бензофенона; от 121,0 до 124,0 ℃ –  для бензойной кислоты; от 234,0 до 238,0 ℃ –  для кофеина.Сравнительный анализ полученных аттестованных значений с референтными данными, приведенными в Международной температурной шкале МТШ-90 и справочных материалах NIST, показал их высокую степень согласованности. Расхождения составили: для бензофенона –  в пределах ± 0,3 ℃; для бензойной кислоты и кофеина –  в пределах ± 0,65 °C. В основном отличия обусловлены химической чистотой веществ. Результаты измерений бензойной кислоты с чистотой 99,99 % и выше согласуются в пределах ± 0,01 °C.Теоретическая значимость проведенной работы заключается в обосновании применимости метода дифференциальной сканирующей калориметрии для создания утвержденных типов стандартных образцов температуры фазовых переходов. Результатом стала разработка набора СО (ББК СО УНИИМ), зарегистрированного в Федеральном информационном фонде по обеспечению единства измерений под номерами ГСО 12725-2024/ГСО 12727-2024.Практическая ценность полученных результатов состоит в расширении возможностей для калибровки и контроля средств измерений термического анализа, аттестации соответствующих методик измерений, а также обеспечении достоверности и точности определения температур фазовых переходов для широкого круга материалов, включая металлы, их соли и оксиды, полимеры, органические и неорганические соединения.</p></abstract><trans-abstract xml:lang="en"><p>With the advancement of scientific and technological progress in the fields of metrological supervision, chemical and pharmaceutical industries, ensuring continuous metrological control of measuring instruments used in thermal analysis is of particular importance. A key aspect of solving this problem and ensuring traceability of measurement results to the base units of physical quantities is the high accuracy of determining phase transition temperatures, such as melting, crystallization, sublimation, dropping point, softening point, cloud point and other characteristic temperatures of organic compounds.Within the framework of this study, an aim was set to evaluate the possibility of using organic compounds based on benzophenone, benzoic acid and caffeine as promising candidates for the development of reference materials for phase transition temperature, ensuring traceability to the unit of temperature (°C).Measurements of phase transition temperatures (melting temperatures) were carried out using differential scanning calorimetry on a STA 449 F5 JUPITER thermal analyzer, which is part of the State Primary Standard of units of mass fraction and mass (molar) concentration of water in solid and liquid substances and materials GET 173. The certified values of the developed reference materials were established in accordance with the requirements of GOST ISO Guide 35-2015 «General and statistical principles for certification». During the work, the uncertainties due to the heterogeneity of the initial materials were quantitatively assessed, and their short-term and long-term stability was investigated.As a result of the development of the reference materials, the ranges of permissible certified values for melting temperature were established: from 47.0 to 50.0 °C –  for benzophenone; from 121.0 to 124.0 °C –  for benzoic acid; from 234.0 to 238.0 °C –  for caffeine.A comparative analysis of the obtained certified values with reference data given in the International Temperature Scale ITS-90 and NIST reference materials showed a high degree of agreement. The deviations were: for benzophenone –  within ±0.3 °C; for benzoic acid and caffeine –  within ± 0.65 °C. The differences are mainly due to the chemical purity of the substances. Measurement results for benzoic acid with a purity of 99.99 % and above agree within ± 0.01 °C.The theoretical significance of the work lies in the experimental confirmation of the effectiveness of differential scanning calorimetry for the development of certified reference materials for phase transition temperatures. The result was the development of a set of CRMs (BBK SO UNIIM), registered in the Federal Information Fund for Ensuring the Uniformity of Measurements under the numbers GSO 12725-2024 / GSO  12727-2024.The practical value of the obtained results lies in expanding the possibilities for calibration and control of thermal analysis measuring instruments, validation of the relevant measurement procedures, as well as ensuring the reliability and accuracy of determination of phase transition temperatures for a wide range of materials, including metals, their salts and oxides, polymers, organic and inorganic compounds.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стандартные образцы</kwd><kwd>термический анализ</kwd><kwd>температура фазового перехода</kwd><kwd>дифференциальная сканирующая калориметрия</kwd><kwd>бензофенон</kwd><kwd>бензойная кислота</kwd><kwd>кофеин</kwd><kwd>методика измерений</kwd></kwd-group><kwd-group xml:lang="en"><kwd>reference materials</kwd><kwd>thermal analysis</kwd><kwd>phase transition temperature</kwd><kwd>differential scanning calorimetry</kwd><kwd>benzophenone</kwd><kwd>benzoic acid</kwd><kwd>caffeine</kwd><kwd>measurement procedure</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы выражают благодарность М. 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