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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">10.26896/1028-6861-2019-85-4-17-21</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-961</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>СПЕКТРОФОТОМЕТРИЧЕСКОЕ ОПРЕДЕЛЕНИЕ ИОДАТА В ЙОДИДАХ ЩЕЛОЧНЫХ МЕТАЛЛОВ</article-title><trans-title-group xml:lang="en"><trans-title>SPECTROPHOTOMETRIC DETERMINATION OF IODATE IN IODIDES OF ALKALINE METALS</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>Гайдук</surname><given-names>Ольга Васильевна</given-names></name><name name-style="western" xml:lang="en"><surname>Gayduk</surname><given-names>Olga V.</given-names></name></name-alternatives><email xlink:type="simple">gayduk@isc.kharkov.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГНУ «НТК «Институт монокристаллов» НАН Украины, г. Харьков</institution><country>Украина</country></aff><aff xml:lang="en"><institution>State Scientific Institution "STC "Institute for Single Crystals" NAS of Ukraine, Kharkov</institution><country>Ukraine</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>14</day><month>05</month><year>2019</year></pub-date><volume>85</volume><issue>4</issue><fpage>17</fpage><lpage>21</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гайдук О.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Гайдук О.В.</copyright-holder><copyright-holder xml:lang="en">Gayduk O.V.</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/961">https://www.zldm.ru/jour/article/view/961</self-uri><abstract><p>Изучены условия взаимодействия йодат-ионов с йодидом и метиленовьгм голубым в качестве хромогенного реагента. Взаимодействие йодата с избытком йодида зависит от кислотности среды. В разбавленных кислотах реакция IO3 - сI- проходит с выделением йода, который окисляет краситель. В результате окислительной деструкции метиленового голубого происходит ослабление окраски реагента, которое пропорционально концентрации йодат-ионов в растворе. Исследованы спектры метиленового голубого, условия окислительно-восстановительного взаимодействия, влияние кислотности среды и концентрации раствора реагента на полноту протекания реакции. Светопоглощение испытуемых растворов измеряли на длине волны 664 им. Реакция образования свободного йода проходит быстро и количественно при рН 4 - 5 . Для создания необходимой кислотности среды использовали 1 М раствор уксусной кислоты. Найдена оптимальная концентрация метиленового голубого. Исследования положены в основу методики определения йодат-ионов в йодидах щелочных металлов. Чтобы предотвратить окисление йодида кислородом воздуха, анализируемые растворы готовили с добавлением ацетата натрия. Для устранения влияния железа (III) использовали пирофосфат натрия, который следует вводить после подкисления раствора и выделения йода. Правильность методики подтверждена при анализе модельных растворов по схеме «введено — найдено» и реальных образцов способом варьирования навесок. Разработанная методика апробирована при определении йодат-ионов в йодидах цезия и натрия. Относительное стандартное отклонение не превышает 15 %. Предложенная методика позволила увеличить чувствительность определения йодат-ионов в 10 раз по сравнению с ранее применявшейся для этой цели методикой, основанной на образовании йодокрахмального комплекса.</p></abstract><trans-abstract xml:lang="en"><p>Conditions for interaction of the iodate ions with iodide and methylene blue as a chromogenic reagent were studied. The interaction of iodate with an excess of iodide depends on the medium acidity. In dilute acids, the reaction of IO3 with Г is accompanied with a release of iodine which oxidizes the dye. The observed weakening of the color which is proportional to the concentration of iodate ions in the solution, results from the oxidative destruction of methylene blue. Spectra of methylene blue, conditions of the redox interaction, as well as the effect of the solution acidity and reagent concentration on the completeness of the reaction were studied. The light absorption of the solutions was measured at a wavelength of 664 nm. The reaction of the free iodine formation is rapid and quantitative at pH 4 - 5 . The desired acidity of the medium was attained using 1 M solution of acetic acid. The optimal concentration of methylene blue was determined. The results of the study formed a base for developing a technique of iodate ion determination in iodides of alkaline metals. The analyzed solutions were prepared with addition of sodium acetate to prevent iodide oxidation by atmospheric oxygen. To eliminate the interfering effect of Fe (III), sodium pyrophosphate (which should be introduced after acidification of the solution and isolation of iodine) was used. The accuracy of the technique was proved in spike tests on the model solutions and real samples by the method of sample weight variation. The developed technique was tested in determination of the iodate ions in cesium and sodium iodides. The relative standard deviation does not exceed 15%. The sensitivity of the developed technique is 10 times higher compared to the technique based on the formation of an iodine-starch complex.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>йодат-ион</kwd><kwd>йодид-ион</kwd><kwd>метиленовый голубой</kwd><kwd>окисление</kwd><kwd>йодиды щелочных металлов</kwd><kwd>спектрофотомерия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>iodate ion</kwd><kwd>iodide ion</kwd><kwd>methylene blue</kwd><kwd>oxidation</kwd><kwd>iodides of alkali metals</kwd><kwd>spectrophotometry</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">Trefilova L., Grinyov В., Alekseev V., et al. The reasons the scintillation efficiency decrease of CsI(Tl) crystals exposed by the high-dosed radiation / Radiat. Meas. 2007. Vol. 42. E 839 - 842.</mixed-citation><mixed-citation xml:lang="en">Trefilova L., Grinyov В., Alekseev V, et al. 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