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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">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-1069</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>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>Использование ультразвуковой дисперсионной микротвердофазной экстракции для концентрирования следов кобальта и никеля и их прецизионного определения в образцах окружающей среды с помощью пламенной атомно-абсорбционной спектрометрии</article-title><trans-title-group xml:lang="en"><trans-title>Ultrasound-Assisted Dispersive Microsolid-Phase Extraction for Preconcentration of Trace Cobalt and Nickel in Environmental Samples Prior to Their Determination by Flame Atomic Absorption Spectrometry</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>Gouda</surname><given-names>A. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Gouda</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</p></bio><email xlink:type="simple">aymangouda77@gmail.com</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>El Sheikh</surname><given-names>R.</given-names></name><name name-style="western" xml:lang="en"><surname>El Sheikh</surname><given-names>R.</given-names></name></name-alternatives><bio xml:lang="en"><p>Zagazig</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>El Sayed</surname><given-names>H. M.</given-names></name><name name-style="western" xml:lang="en"><surname>El Sayed</surname><given-names>H. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</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>Khedr</surname><given-names>A. M.</given-names></name><name name-style="western" xml:lang="en"><surname>Khedr</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Танта</p></bio><bio xml:lang="en"><p>Tanta</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>Abo Al Ezz</surname><given-names>Sh.</given-names></name><name name-style="western" xml:lang="en"><surname>Abo Al Ezz</surname><given-names>Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</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>Gamil</surname><given-names>W.</given-names></name><name name-style="western" xml:lang="en"><surname>Gamil</surname><given-names>W.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Загазиг</p></bio><bio xml:lang="en"><p>Zagazig</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>Hamdy</surname><given-names>M.</given-names></name><name name-style="western" xml:lang="en"><surname>Hamdy</surname><given-names>M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Порт-Саид</p></bio><bio xml:lang="en"><p>Port Said</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Загазига</institution></aff><aff xml:lang="en"><institution>Zagazig University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет Танты</institution></aff><aff xml:lang="en"><institution>Tanta University</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Университет Порт-Саида</institution></aff><aff xml:lang="en"><institution>Port Said University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>26</day><month>05</month><year>2022</year></pub-date><volume>89</volume><issue>3</issue><fpage>433</fpage><lpage>433</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Gouda A.A., El Sheikh R., El Sayed H.M., Khedr A.M., Abo Al Ezz S., Gamil W., Hamdy M., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Gouda A.A., El Sheikh R., El Sayed H.M., Khedr A.M., Abo Al Ezz S., Gamil W., Hamdy M.</copyright-holder><copyright-holder xml:lang="en">Gouda A.A., El Sheikh R., El Sayed H.M., Khedr A.M., Abo Al Ezz S., Gamil W., Hamdy M.</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://zhps.ejournal.by/jour/article/view/1069">https://zhps.ejournal.by/jour/article/view/1069</self-uri><abstract><p>Разработан простой и экологичный подход к ультразвуковой дисперсионной микротвердофазной экстракции с использованием новых модифицированных адсорбентом многостенных углеродных нанотрубок (MWCNTs) для разделения и предварительной концентрации ионов кобальта Co(II) и никеля Ni(II) в различных образцах окружающей среды перед определением методом пламенной атомно-абсорбционной спектрометрии. Предлагаемый метод основан на модификации MWCNTs комплексообразователем 3-(2,4-дигидроксифен-1-илазо)-1,2,4-триазолом, который образует комплекс с ионами Co(II) или Ni(II) в качестве селективного и эффективного сорбента при рН 8.0. Исследовано и оптимизировано влияние различных параметров. Калибровочные кривые линейные в пределах 1.0–200 и 2.0–300 мкг/л; пределы обнаружения при оптимальных условиях 0.30 и 0.60 мкг/л для ионов Co(II) и Ni(II). Коэффициент предварительной концентрации 200. Максимальная сорбционная способность Co(II) и Ni(II) ~300 и 380 мг/г. Показатели извлечения анализируемых веществ 96.0—102 %. Относительное стандартное отклонение (RSD%) для внутрисуточной и межсуточной повторяемостей 1.30, 1.70 % и 1.750, 1.95% для Co(II) и Ni(II) соответственно. Сертифицированные справочные материалы (листья шпината SRM 1570A и обогащенная вода TMDA-52.3) использованы для проверки точности предлагаемого протокола предварительной концентрации. Метод успешно применен для определения содержания ионов Co(II) и Ni(II) в образцах воды, соков и пищевых продуктов.</p></abstract><trans-abstract xml:lang="en"><p>A new, green, simple, and validated ultrasound-assisted dispersive microsolid-phase extraction method applying unprecedented adsorbent-modified multiwalled carbon nanotubes was achieved for preconcentration and separation of trace cobalt (Co(II)) and nickel (Ni(II)) ions in diverse ecological samples before determination by flame atomic absorption spectrometry. The suggested approach uses a novel chelating agent named 3-(2,4-dihydroxyphen-1-ylazo)-1,2,4-triazole, which is chelated with Co(II) or Ni(II) ions as efficient and selective sorbent at pH 8.0. The impact of many parameters has been studied and optimized. Under ideal conditions, the calibration curves were linear within 1.0–200 and 2.0–300 μg/L ranges, with limits of detection equaling 0.30 and 0.60 μg/L for Co(II) and Ni(II) ions, respectively. The preconcentration factor attained 200, while the highest sorption capacities of Co(II) and Ni(II) are around 300 and 380 mg/g, respectively. The relative standard deviation (%RSD) regarding repeatability for Co(II) and Ni(II) upon calculation was 1.30 and 1.70% for intraday, and 1.750 and 1.95% for interday. To ensure the correctness of the suggested preconcentration approach, certified reference materials (SRM 1570A spinach leaves and TMDA-52.3 enriched water) were employed. The proposed approach was applied to determine the concentration of Co(II) and Ni(II) ions in a range of genuine water, juice, and food samples, and the findings were excellent.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ультразвуковая дисперсионная микротвердофазная экстракция</kwd><kwd>многостенные углеродные нанотрубки</kwd><kwd>кобальт</kwd><kwd>никель</kwd><kwd>образцы окружающей среды</kwd><kwd>пламенная атомноабсорбционная спектрометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ultrasound-assisted dispersive microsolid-phase extraction</kwd><kwd>multiwalled carbon nanotubes</kwd><kwd>cobalt</kwd><kwd>nickel</kwd><kwd>environmental samples</kwd><kwd>flame atomic absorption spectrometry</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">ATSDR, Toxicological Profile for Cobalt, U. S. 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