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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">10.26896/1028-6861-2020-86-5-5-10</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1200</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 микроконцентраций иридия кинетическим каталитическим методом</article-title><trans-title-group xml:lang="en"><trans-title>Determination of the iridium micro-concentrations using a kinetic catalytic method</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>Хомутова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Khomutova</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Григорьевна Хомутова</p><p>119454, Москва, проспект Вернадского, 78</p></bio><bio xml:lang="en"><p>Elena G. Khomutova</p><p>78, Vernadskogo prosp., Moscow, 119454</p></bio><email xlink:type="simple">khomutova@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>Левкевич</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Levkevich</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Александровна Левкевич</p><p>119454, Москва, проспект Вернадского, 78</p></bio><bio xml:lang="en"><p>Ekaterina A. Levkevich</p><p>78, Vernadskogo prosp., Moscow, 119454</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МИРЭА — Российский технологический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA — Russian Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>22</day><month>05</month><year>2020</year></pub-date><volume>86</volume><issue>5</issue><fpage>5</fpage><lpage>10</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хомутова Е.А., Левкевич Е.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Хомутова Е.А., Левкевич Е.А.</copyright-holder><copyright-holder xml:lang="en">Khomutova E.G., Levkevich E.A.</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/1200">https://www.zldm.ru/jour/article/view/1200</self-uri><abstract><p>Впервые изучено каталитическое действие иридия на реакцию окисления водорастворимого порфирина — 5,10,15,20-тетракис(4-сульфонатофенил)порфина (ТСФП) — перйодатом натрия. Разработана методика определения микросодержаний иридия по его каталитическому действию на данную реакцию в проточно-инжекционной системе. Нижняя граница определяемых концентраций иридия составляет 0,2 · 10–5 мкг/мл (P = 0,95), что ниже, чем для описанных в литературе методик. Найдены оптимальные условия анализа: pH 3, концентрации реагентов в потоках заданной гидравлической схемы смешения — 0,5 · 10–5 моль/л ТСФП и 0,15 моль/л NaIO4, комнатная температура проведения индикаторной реакции. При оптимальных условиях получили линейную градуировочную характеристику в интервале концентраций иридия (0,2 – 2,0) · 10–5 мкг/мл. Исследовали влияние сопутствующих иридию в промышленных и природных материалах элементов: его определению не мешают мольные избытки платиновых и цветных металлов: 20-кратный — Rh (III); 15-кратный — Pt (IV) и Fe (II); 20-кратный — Ni (II). Правильность результатов подтверждена методом «введено – найдено» при анализе модельных растворов, содержащих иридий. Sr результатов определения иридия в условиях повторяемости (n = 3; P = 0,95) не превышает 0,04. Сравнение полученных результатов с литературными данными показало, что основными преимуществами предлагаемой методики определения иридия являются проведение реакции при комнатной температуре с более простым аппаратурным оформлением и меньшее значение нижней границы определяемых содержаний иридия.</p></abstract><trans-abstract xml:lang="en"><p>The catalytic effect of iridium on the oxidation of water-soluble porphyrin — 5,10,15,20-tetrakis (4-sulfonatophenyl) porphin (TSPP) with sodium periodate is studied for the first time. A method for determination of the iridium micro-content by the catalytic effect of iridium on the oxidation of water-soluble porphyrin 5,10,15,20-tetrakis (4-sulfonatophenyl) porphin with sodium periodate in a flow-injection system is developed. The lower limit of the determined iridium concentrations is 0.2 × 10–5 μg/ml (P = 0.95), which is lower than that for the methods described in the literature. Optimal conditions for determination have been specified: pH 3; concentration of the reagents in the flows of a given hydraulic mixing scheme 0.5 × 10–5 M TSPP and 0.15 M NaIO4; room temperature for the indicator reaction. A linear calibration characteristic was obtained under chosen optimal conditions in the range of iridium concentrations (0.2 – 2.0) × 10 – 5 μg/ml. The effect of the elements accompanying iridium in industrial and natural materials was studied. Molar excesses of platinum and non-ferrous metals do not interfere with iridium determination: 20-fold Rh (III); 15-fold Pt (IV) and Fe (II); and 20-fold molar excess of Ni (II). Correctness of the results is confirmed by spike recovery tests on model iridium-containing solutions. Sr of the results of iridium determination under selected conditions at n = 3, P = 0.95 on model solutions is no more than 0.04. A comparison of the obtained results with literature data showed that the main advantages of the proposed method for iridium determination are room temperature of the reaction, more simple hardware design and lower limit of the iridium determination.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кинетические методы анализа</kwd><kwd>проточно-инжекционный анализ</kwd><kwd>платиновые металлы</kwd><kwd>иридий</kwd><kwd>водорастворимый порфирин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>kinetic methods of analysis</kwd><kwd>flow-injection analysis</kwd><kwd>platinum metals</kwd><kwd>iridium</kwd><kwd>water-soluble porphyrine</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">Ali I., AlGhamdi K., Al-Wadaani F. T. 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