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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">10.20915/2077-1177-2023-19-2-61-71</article-id><article-id custom-type="elpub" pub-id-type="custom">rmjournal-388</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>Определение масличности семян подсолнечника по натуральным образцам подсолнечного масла: на примере градуировки импульсного ЯМР-анализатора</article-title><trans-title-group xml:lang="en"><trans-title>Determination of the Oil Content of Sunflower Seeds Using Natural Samples of Sunflower Oil: on the Example of the Calibration of a Pulsed NMR Analyzer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0209-5432</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Агафонов</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Agafonov</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Агафонов Олег Сергеевич – канд. техн. наук, старший научный сотрудник отдела физических методов исследований</p><p>350038, г. Краснодар, ул. им. Филатова, 17</p></bio><bio xml:lang="en"><p>Oleg S. Agafonov – Cand. Sci. (Eng.), Senior Researcher at the Department of Physical Methods of Research</p><p>17 Filatova str., Krasnodar, 350038</p></bio><email xlink:type="simple">sacred_jktu@bk.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/0000-0002-5768-0807</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прудников</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Prudnikov</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Прудников Сергей Михайлович – д. техн. наук, профессор, заведующий отделом физических методов исследований</p><p>350038, г. Краснодар, ул. им. Филатова, 17</p></bio><bio xml:lang="en"><p>Sergey M. Prudnikov – Dr. Sci. (Eng.), Professor, Head of the Department of Physical Methods of Research</p><p>17 Filatova str., Krasnodar, 350038</p></bio><email xlink:type="simple">vniimk@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФГБНУ Федеральный научный центр «Всероссийский научно-исследовательский институт масличных культур имени В. С. Пустовойта»<country>Россия</country></aff><aff xml:lang="en">V. S. Pustovoit All-Russian Research Institute of Oil Сrops<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>10</day><month>04</month><year>2023</year></pub-date><volume>19</volume><issue>2</issue><fpage>61</fpage><lpage>71</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Агафонов О.С., Прудников С.М., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Агафонов О.С., Прудников С.М.</copyright-holder><copyright-holder xml:lang="en">Agafonov O.S., Prudnikov S.M.</copyright-holder><license 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/388">https://www.rmjournal.ru/jour/article/view/388</self-uri><abstract><p>Одним из главных показателей семян подсолнечника является его масличность. Эта характеристика обязательна для сертификации сельскохозяйственной продукции и оценки их стоимости. Для определения масличности применяют метод ИК-спектроскопии и импульсные методы ЯМР.</p><p>Цель настоящего исследования заключалась в научно-практическом обосновании возможности применения для градуировки ЯМР-анализаторов образцов подсолнечного масла с целью идентификации и оценки качества масличных семян и продуктов их переработки на основе метода ЯМР. Для решения поставленной задачи проведено сравнение результатов различных вариантов градуировки импульсного ЯМР-анализатора для определения масличности семян подсолнечника. Первый вариант – измерение ЯМ-релаксационных характеристик протонов масла, подготовленных образцов семян подсолнечника, с последующим определение содержания в них масла методом исчерпывающей экстракции в аппарате Сокслета, построением по полученным данным градуировочного уравнения и внесением его коэффициентов в программу ЯМР-анализаторов.</p><p>Полученная градуировка являлась базовой, с которой сравнивали другие варианты градуировки. Второй вариант – использование для градуировки ЯМР-анализатора различных образцов подсолнечного масла, полученного прессованием из семян подсолнечника тех же сортов и гибридов, которые использовали для первого варианта градуировки, а также образцов подсолнечного масла, приобретенных в торговой сети. С помощью лабораторных весов отбирали от каждого образца масла пять навесок, равномерно распределенных в диапазоне от 2,000 г до 7,000 г с точностью 0,001 г, и измеряли в них амплитуды сигналов ЯМР протонов. Далее были построены графики зависимости между массой масла анализируемых проб и амплитудой сигналов ЯМР протонов в них. Сравнение полученных градуировочных зависимостей показало их близкий характер. Математические расчеты показали, что применение для градуировки ЯМР-анализаторов подсолнечного масла не приводит к увеличению погрешности результатов измерения масличности семян подсолнечника по сравнению с первым вариантом проведения градуировки.</p><p>Практическая значимость исследования позволит значительно упростить процесс градуировки, сократить время проведения градуировки с 3–4 дней до 3–4 часов, а также исключить применение токсичных растворителей, дополнительного дорого оборудования без существенного изменения значений погрешности определения масличности семян подсолнечника методом ЯМР.</p></abstract><trans-abstract xml:lang="en"><p>One of the main parameters of sunflower seeds is its oil content. This characteristic is mandatory for certifica[<xref ref-type="bibr" rid="cit1">1</xref>]tion of agricultural products and assessment of their value. IR spectroscopy and pulsed NMR methods are widely used to determine the oil content.</p><p>The purpose of the research was to scientifically and practically substantiate the possibility of using sunflower oil samples for calibrating NMR analyzers, identifying and assessing the quality of oilseeds and products of their processing based on the NMR method. The comparison of the results of various options for the calibration of a pulsed NMR analyzer for determining the oil content of sunflower seeds was carried out. The first option was to measure the NM relaxation characteristics of oil protons from prepared samples of sunflower seeds, followed by determination of their oil content by exhaustive extraction in a Soxhlet apparatus, construction of a calibration equation based on the obtained data, and entering its coefficients into the program of NMR analyzers.</p><p>The resulting calibration was the base one, with which other calibration options were compared. The second option was to use for calibrating the NMR analyzer various samples of sunflower oil obtained by pressing from sunflower seeds of the same varieties and hybrids, that were used for the first calibration option, as well as sunflower oil samples purchased in a commercial network. Five samples evenly distributed in the range from 2.000 g to 7.000 g with an accuracy of 0.001 g were taken from each oil sample using laboratory scales, and the amplitudes of proton NMR signals were measured in them. The dependency between the oil mass of the analyzed samples and the amplitude of proton NMR signals in them was graphed. Comparison of the obtained calibration dependences showed their close nature. Mathematical calculations have shown that the use of sunflower oil for the calibration of NMR analyzers does not lead to an increase in the error in the measurement results of the oil content of sunflower seeds compared to the first option of the calibration.</p><p>The practical significance of the research will considerably simplify the calibration process, reduce the calibration time from 3–4 days to 3–4 hours, and eliminate the use of toxic solvents and additional expensive equipment without a significant change in the error in determining the oil content of sunflower seeds by NMR.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ЯМР-анализатор</kwd><kwd>градуировка</kwd><kwd>масличность</kwd><kwd>влажность</kwd><kwd>стандартные образцы</kwd><kwd>семена подсолнечника</kwd><kwd>подсолнечное масло</kwd></kwd-group><kwd-group xml:lang="en"><kwd>NMR analyzer</kwd><kwd>calibration</kwd><kwd>oil content</kwd><kwd>humidity</kwd><kwd>reference materials</kwd><kwd>sunflower seeds</kwd><kwd>sunflower oil</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">Pérez-Vich B., Velasco L., Fernández-Martínez J. 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