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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">10.26896/1028-6861-2023-89-3-25-30</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1884</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>Оптимизация процедуры пробоподготовки при определении угексахлорциклогексана в воде методом газовой хроматографии</article-title><trans-title-group xml:lang="en"><trans-title>Optimization of the sample preparation procedure in the determination of y-hexachlorocyclohexane in water by gas chromatography</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>Мусабиров</surname><given-names>Д. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Musabirov</surname><given-names>D. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Эдуардович Мусабиров</p><p>450106, г. Уфа, ул. Кувыкина, д. 94</p></bio><bio xml:lang="en"><p>Dmitry E. Musabirov</p><p>450106, Ufa, ul. Kuvykina, 94</p></bio><email xlink:type="simple">30102000@rambler.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>Даукаев</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Daukaev</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рустем Аскарович Даукаев</p><p>450106, г. Уфа, ул. Кувыкина, д. 94</p></bio><bio xml:lang="en"><p>Rustem A. Daukaev</p><p>450106, Ufa, ul. Kuvykina, 94</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>Аллаярова</surname><given-names>Г. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Allayarova</surname><given-names>G. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гузель Римовна Аллаярова</p><p>450106, г. Уфа, ул. Кувыкина, д. 94</p></bio><bio xml:lang="en"><p>Guzel R. Allayarova</p><p>450106, Ufa, ul. Kuvykina, 94</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>Зеленковская</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Zelenkovskaya</surname><given-names>E. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгения Евгеньевна Зеленковская</p><p>450106, г. Уфа, ул. Кувыкина, д. 94</p></bio><bio xml:lang="en"><p>Evgenia E. Zelenkovskaya</p><p>450106, Ufa, ul. Kuvykina, 94</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>Гуськов</surname><given-names>В. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Guskov</surname><given-names>V. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Юрьевич Гуськов</p><p>г. Уфа</p></bio><bio xml:lang="en"><p>Vladimir Yu. Guskov</p><p>Ufa</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уфимский НИИ медицины труда и экологии человека; Башкирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ufa Research Institute of Occupational Medicine and Human Ecology; Bashkir State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Уфимский НИИ медицины труда и экологии человека</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ufa Research Institute of Occupational Medicine and Human Ecology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Башкирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bashkir 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>23</day><month>03</month><year>2023</year></pub-date><volume>89</volume><issue>3</issue><fpage>25</fpage><lpage>30</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мусабиров Д.Э., Даукаев Р.А., Аллаярова Г.Р., Зеленковская Е.Е., Гуськов В.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Мусабиров Д.Э., Даукаев Р.А., Аллаярова Г.Р., Зеленковская Е.Е., Гуськов В.Ю.</copyright-holder><copyright-holder xml:lang="en">Musabirov D.E., Daukaev R.A., Allayarova G.R., Zelenkovskaya E.E., Guskov V.Y.</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/1884">https://www.zldm.ru/jour/article/view/1884</self-uri><abstract><p>Усовершенствована процедура пробоподготовки питьевой воды при определении остаточных количеств у-гексахлорциклогексана (у-ГХЦГ) методом газовой хроматографии с детектором электронного захвата, описанная в ГОСТ 31858-2012. Строго следуя указаниям стандарта, нам не удалось получить предписанного значения коэффициента извлечения у-ГХЦГ 94 %. В связи с этим для сокращения потерь на стадии пробоподготовки было предложено использовать в качестве экстрагента более высококипящий re-гептан вместо к-гексана, а для разрушения эмульсии, образующейся в ходе экстракции гексаном, — хлорид натрия вместо этилового спирта. Оптимизировали также объем анализируемой пробы, массу хлорида натрия, объем экстрагента и время экстракции. Было показано, что применение хлорида натрия позволяет достичь полного разрушения эмульсии и повысить степень извлечения пестицидов при их концентрации 22 мкг/л с 77 до 96 % при относительном стандартном отклонении 2 %. Замена экстрагента на к-гептан привела к росту степени извлечения у-ГХЦГ до 98 % с относительным стандартным отклонением 1 %. Повышение концентрации у-ГХЦГ до 45 мкг/л приводит к резкому уменьшению степени извлечения. Предложенный усовершенствованный способ жидкость-жидкостной экстракции позволяет извлекать у-ГХЦГ из водной матрицы на 98 - 100 % при концентрации пестицида менее 22 мкг/л.</p></abstract><trans-abstract xml:lang="en"><p>A high toxicity of organochlorine compounds, even present in trace amounts in food products, leads to increased requirements for the accuracy of chemical analysis in food safety control. The interstate standard GOST 31858-2012 was taken as a basis for this study. We have improved the method of sample preparation of drinking water for the determination of residual amounts of y-hexachlorocyclohexane (y-HCCH) by gas chromatography with an electron capture detector. Strictly following the instructions of the standard, we failed to obtain the value of the recovery factor of 94% prescribed by GOST for y-HCCH. In this regard, we proposed to use higher-boiling re-heptane instead of re-hexane as an extractant to reduce losses at the stage of sample preparation, and to use sodium chloride instead of ethyl alcohol prescribed by GOST to break the emulsion formed during the extraction of water with hexane. The volume of the analyzed sample, the mass of sodium chloride, the volume of the extragent, and the extraction time were optimized. The use of sodium chloride is shown to provide total emulsion breakage in 100% of experiments and to increase the recovery of pesticides with a concentration of 22 pg/liter from 77 to 96% with a relative standard deviation of 2%. Replacing the extragent with re-heptane led to an increase in the recovery of Y-HCCH to 98% with a relative standard deviation of 1%. It is shown that at a lower concentration of the pesticide, the recovery rate is 98 - 100 %. An increase in the concentration of y-HCCH to 45 pg/liter leads to a sharp decrease in the recovery degree. The proposed method can be considered as an improved method of liquid-liquid extraction with excellent extraction of the pesticide from the aqueous matrix.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>у-гексахлорциклогексан</kwd><kwd>питьевая вода</kwd><kwd>газовая хроматография</kwd><kwd>степень извлечения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Y-hexachlorocyclohexane</kwd><kwd>drinking water</kwd><kwd>gas chromatography</kwd><kwd>recovery.</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">Друго е Ю. С., Зенкеви ч И. Г., Роди н А. А. Еазохроматографическая идентификация загрязнений воздуха, воды, почвы и биосред: практич. рук-во. — М.: БИНОМ. Лаборатория знаний, 2005. — 752 с.</mixed-citation><mixed-citation xml:lang="en">Drugov Yu. S., Zenkevich I. G., Rodin A. A. 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