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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">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2023-89-8-23-30</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1995</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>АНАЛИЗ ВЕЩЕСТВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SUBSTANCES ANALYSIS</subject></subj-group></article-categories><title-group><article-title>Определение аристолохиевой кислоты с помощью пьезоэлектрического иммуносенсора на основе магнитных углеродных нанокомпозитов</article-title><trans-title-group xml:lang="en"><trans-title>Determination of aristolochic acid using a piezoelectric immunosensor based on magnetic carbon nanocomposites</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>Бизина</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bizina</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Вячеславовна Бизина</p><p>398600, г. Липецк, ул. Московская, стр. 30</p></bio><bio xml:lang="en"><p>Ekaterina V. Bizina</p><p>30, Moskovskaya ul. , Lipetsk, 398600</p></bio><email xlink:type="simple">katarina.bizina1821@mail.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>Полосина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Polosina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анна Андреевна Полосина</p><p>398600, г. Липецк, ул. Московская, стр. 30</p></bio><bio xml:lang="en"><p>Anna A. Polosina</p><p>30, Moskovskaya ul. , Lipetsk, 398600</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фарафонова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Farafonova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Вячеславовна Фарафонова</p><p>398600, г. Липецк, ул. Московская, стр. 30</p></bio><bio xml:lang="en"><p>Olga V. Farafonova</p><p>30, Moskovskaya ul. , Lipetsk, 398600</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Еремин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Eremin</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Александрович Еремин</p><p>119991, Москва, Ленинские горы, стр. 1</p></bio><bio xml:lang="en"><p>Sergey A. Eremin</p><p>1, Leninskiye Gory, Moscow, 119991</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ермолаева</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Ermolaeva</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Николаевна Ермолаева</p><p>398600, г. Липецк, ул. Московская, стр. 30</p></bio><bio xml:lang="en"><p>Tatyana N. Ermolaeva</p><p>30, Moskovskaya ul. , Lipetsk, 398600</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Липецкий государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lipetsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет имени М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M. V. Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>24</day><month>08</month><year>2023</year></pub-date><volume>89</volume><issue>8</issue><fpage>23</fpage><lpage>30</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бизина Е.В., Полосина А.А., Фарафонова О.В., Еремин С.А., Ермолаева Т.Н., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Бизина Е.В., Полосина А.А., Фарафонова О.В., Еремин С.А., Ермолаева Т.Н.</copyright-holder><copyright-holder xml:lang="en">Bizina E.V., Polosina A.A., Farafonova O.V., Eremin S.A., Ermolaeva T.N.</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.zldm.ru/jour/article/view/1995">https://www.zldm.ru/jour/article/view/1995</self-uri><abstract><p>Представлена методика определения аристолохиевой кислоты (АА) в пищевой продукции с использованием пьезоэлектрического иммуносенсора, в качестве распознающего слоя которого служили магнитные углеродные нанокомпозиты (МУНК) с иммобилизоваными на их поверхности белковыми конъюгатами AA. Изучены способы синтеза магнитных ядер Fe3O4 и их закрепление на поверхности многостенных углеродных нанотрубок (УНТ). Методом ИК-спектроскопии установлено, что формирование распознающего слоя сенсора происходит вследствие образования ковалентных связей между аминогруппами конъюгатов AA и карбоксильными группами УНТ. Определены концентрации белковых конъюгатов на основе овальбумина (OVA) и бычьего сывороточного альбумина (BSA) (0,3 и 0,2 мг/мл) и степень разбавления антител (0,25), обеспечивающие оптимальные характеристики пьезоэлектрического иммуносенсора. Установлены метрологические характеристики определения AA предложенным способом: диапазон определяемых содержаний и предел обнаружения AA при применении пьезоэлектрического иммуносенсора с распознающим слоем на основе МУНК/AA-OVA и МУНК/AA-BSA составляют (нг/мл): 50 – 400 и 10; 100 – 300 и 50 соответственно. Сенсор апробирован при определении AA в образцах китайского фиточая и БАД для похудения. В чае кислота не обнаружена, а в БАД ее содержание составляет 3,2 мкг/г.</p></abstract><trans-abstract xml:lang="en"><p>A technique for the determination of aristolochic acid (AA) in food products using a piezoelectric immunosensor is presented. Magnetic carbon nanocomposites (MCNC) were used as the recognition layer of the sensor, on the surface of which protein conjugates of AA were immobilized. Abstract-Methods for the synthesis of Fe3O4 magnetic nuclei and their attachment to the surface of multi-walled carbon nanotubes (CNTs) have been studied. Using IR spectrometry, it was found that the formation of the recognition layer of the sensor occurs due to the formation of covalent bonds between the amino groups of AA conjugates and carboxyl groups of CNTs. The concentrations of protein conjugates based on ovalbumin (OVA) and bovine serum albumin (BSA) (0.3 and 0.2 mg/ml) and the degree of antibody dilution (0.25) were determined, which provide optimal characteristics of the piezoelectric immunosensor. The metrological characteristics of the method for determining AA have been established. The range of determined concentrations of AA and the limit of detection when using a piezoelectric immunosensor with a recognition layer based on MUNA/AA-OVA and MUNA/AA-BSA are (ng/ml): 50 – 400 and 10; 100 – 300 and 50, respectively. The sensor has been tested in the determination of AA in samples of Chinese herbal tea and dietary supplements for weight loss. No acid was found in tea, and in dietary supplements, the acid content is 3.2 μg/g.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>аристолохиевая кислота</kwd><kwd>пьезоэлектрический иммуносенсор</kwd><kwd>магнитные нанокомпозиты</kwd><kwd>многостенные углеродные нанотрубки</kwd><kwd>магнитные наночастицы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>aristolochic acid</kwd><kwd>piezoelectric immunosensor</kwd><kwd>magnetic nanocomposites</kwd><kwd>multi-walled carbon nanotubes</kwd><kwd>magnetic nanoparticles</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">Wang X., Giusti A., Ny A., De Witte P. A. Nephrotoxic effects in zebrafish after prolonged exposure to aristolochic acid / Toxins. 2020. Vol. 12. N 4. P. 217 – 235. DOI: 10.3390/toxins12040217</mixed-citation><mixed-citation xml:lang="en">Wang X., Giusti A., Ny A., De Witte P. A. 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