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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">10.26896/1028-6861-2022-88-12-5-13</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1812</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>Проточно-инжекционное амперометрическое определение адреналина, мелатонина и кортизола на электроде, модифицированном бинарной системой золото - палладий и нафионовой пленкой</article-title><trans-title-group xml:lang="en"><trans-title>Flow-injection amperometric determination of adrenalin, melatonin, and Cortisol on the electrode modified by gold - palladium binary system and Nation film</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>Шайдарова</surname><given-names>Л. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaidarova</surname><given-names>L. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шайдарова Лариса Геннадиевна.</p><p>420008, Казань, Кремлевская ул., д. 18</p></bio><bio xml:lang="en"><p>Larisa G. Shaidarova.</p><p>18, Kremlyovskaya str., Kazan, 420008</p></bio><email xlink:type="simple">larisashaidarova@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>Челнокова</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chelnokova</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Челнокова Ирина Александровна.</p><p>420008, Казань, Кремлевская ул., д. 18</p></bio><bio xml:lang="en"><p>Irina A. Chelnokova.</p><p>18, Kremlyovskaya str., Kazan, 420008</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>Лексика</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Leksina</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лексика Юлия Александровна.</p><p>420008, Казань, Кремлевская ул., д. 18</p></bio><bio xml:lang="en"><p>Yulia A. Leksina.</p><p>18, Kremlyovskaya str., Kazan, 420008</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>Хайруллина</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Khairullina</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хайруллина Дарина Юрьевна.</p><p>420008, Казань, Кремлевская ул., д. 18</p></bio><bio xml:lang="en"><p>Darina Yu. Khairullina.</p><p>18, Kremlyovskaya str., Kazan, 420008</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>Будников</surname><given-names>Г. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Budnikov</surname><given-names>H. C.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Будников Герман Константинович.</p><p>420008, Казань, Кремлевская ул., д. 18</p></bio><bio xml:lang="en"><p>Herman C. Budnikov.</p><p>18, Kremlyovskaya str., Kazan, 420008</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский (Приволжский) федеральный университет, Химический институт им. А.М. Бутлерова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan Federal University, Alexander Butlerov Institute of Chemistry</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>12</month><year>2022</year></pub-date><volume>88</volume><issue>12</issue><fpage>5</fpage><lpage>13</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шайдарова Л.Г., Челнокова И.А., Лексика Ю.А., Хайруллина Д.Ю., Будников Г.К., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Шайдарова Л.Г., Челнокова И.А., Лексика Ю.А., Хайруллина Д.Ю., Будников Г.К.</copyright-holder><copyright-holder xml:lang="en">Shaidarova L.G., Chelnokova I.A., Leksina Y.A., Khairullina D.Y., Budnikov H.C.</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/1812">https://www.zldm.ru/jour/article/view/1812</self-uri><abstract><p>Контроль точного содержания стероидных гормонов и их синтетических аналогов в объектах биомедицины является актуальной аналитической задачей. Разработан способ одновременного селективного и высокочувствительного амперометрического определения адреналина, мелатонина и кортизола с использованием двухдетекторной проточно-инжекционной системы. Детекторами служили планарные углеродные электроды с одним или двумя рабочими электродами, модифицированными бинарной системой золото — палладий, которая проявляет каталитическую активность при электроокислении рассматриваемых органических соединений. Высокая чувствительность определения связана с каталитическими свойствами металлического модификатора: переход от металла к бинарной системе привел к росту каталитического тока окисления гормонов. Различие потенциалов окисления гормонов на предложенном электроде обеспечивает селективность определения адреналина в присутствии мелатонина и кортизола. Для селективного определения мелатонина и кортизола поверхность модифицированного рабочего электрода покрыли нафионовой пленкой. Разность потенциалов пиков окисления адреналина, мелатонина и кортизола на таком электроде составила 300 мВ. Предложенный способ апробирован при анализе образцов урины. Для устранения мешающего влияния электрофильных соединений проточно-инжекционную схему дополнили диализатором и хроматографической мини-колонкой. Линейная билогарифмическая зависимость аналитического сигнала от концентрации адреналина, мелатонина и кортизола наблюдается в интервалах 5,0 • 10-10 - 5,0 • 10-3, 5,0 • 10-11 - 5,0 – 10-3 и 5,0 • 10-12 - 5,0 • 10-3 моль/л соответственно. Амперометрическое определение гормонов в проточно-инжекционной системе приводит к повышению производительности анализа, уменьшению расхода пробы и позволяет автоматизировать процесс.</p></abstract><trans-abstract xml:lang="en"><p>Pharmaceuticals containing steroid hormones and their synthetic analogues are widely used in medicine. Accurate determination of the hormone content in biomedical objects is an urgent problem in modem analytical chemistry. A method for the selective and highly sensitive amperometric determination of adrenaline, melatonin, and cortisol in a flow-injection system has been developed. A scheme of a two-detector flow-injection system was proposed for the simultaneous determination of the adrenaline, melatonin, and cortisol content. Screen-printed carbon electrodes (SPE) with one or two working electrodes modified by gold-palladium binary system, which exhibited catalytic activity upon electrooxidation of organic compounds under study were used as detectors. A high sensitivity of the determination is attributed to the catalytic properties of the metal modifier: the transition between the metal and binary system leads to an increase in the catalytic current of hormones oxidation. The selectivity of the adrenaline determination in the presence of melatonin and cortisol is provided by the difference in the potentials of hormone oxidation at the developed electrode. For the selective determination of melatonin and cortisol the surface of the working electrode was modified by the Nation film. The potential difference between the oxidation peaks of adrenaline, melatonin and cortisol on the modified electrode was 300 mV. The proposed method was tested in analysis of real urine samples. The flow-injection scheme was supplemented with a dialyzer and a chromatographic mini-column to eliminate the interfering effect of electrophilic compounds. The linear logarithmic dependence of the analytical signal on the concentration of adrenaline, melatonin and cortisol is observed in the range from 5.0 x 10-10 to 5.0 x 10-3 M, from 5.0 x 10-11 to 5.0 x 10-3 M, and from 5.0 x 10-12 to 5.0 x 10-3 M, respectively. Amperometric determination of hormones in a flow-injection system leads to an increase in the productivity of analysis, decrease in the sample consumption and provides for automation of the process.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>химически модифицированные электроды</kwd><kwd>бинарная система золото - палладий</kwd><kwd>нафионовая пленка</kwd><kwd>планарный электрод</kwd><kwd>прочно-инжекционный анализ</kwd><kwd>амперометрическое определение адреналина</kwd><kwd>мелатонина и кортизола</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chemically modified electrodes</kwd><kwd>gold-palladium binary system</kwd><kwd>Nation film</kwd><kwd>screen-printed electrode</kwd><kwd>flow-injection analysis</kwd><kwd>amperometric determination of adrenaline</kwd><kwd>melatonin and cortisol</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет средств Программы стратегического академического лидерства Казанского (Приволжского) федерального университета («Приоритет-2030»).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Charithra М. 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