<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">10.26896/1028-6861-2020-86-1-5-12</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-1140</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>Ион-селективный мембранный электрод для определения диклофенака</article-title><trans-title-group xml:lang="en"><trans-title>Ion-selective membrane electrode for diclofenac determination</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>Кормош</surname><given-names>Ж. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kormosh</surname><given-names>Zholt A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жолт Александрович Кормош</p><p>43025, г. Луцк, пр-т Воли, 13</p></bio><bio xml:lang="en"/><email xlink:type="simple">zholt-1971@ukr.net</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>Антал</surname><given-names>И. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Antal</surname><given-names>Irina P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ирина Петровна Антал</p><p>43025, г. Луцк, пр-т Воли, 13</p></bio><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Восточноевропейский национальный университет им. Леси Украинки</institution><country>Украина</country></aff><aff xml:lang="en"><institution>Lesya Ukrainka Eastern European National University</institution><country>Ukraine</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>30</day><month>01</month><year>2020</year></pub-date><volume>86</volume><issue>1</issue><fpage>5</fpage><lpage>12</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кормош Ж.А., Антал И.П., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Кормош Ж.А., Антал И.П.</copyright-holder><copyright-holder xml:lang="en">Kormosh Z.A., Antal I.P.</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/1140">https://www.zldm.ru/jour/article/view/1140</self-uri><abstract><p>На основе использования в качестве электродноактивного вещества (ЭАВ) ионного ассоциата (ИА) диклофенак — толуидиновый голубой разработан новый мембранный ионоселективный электрод (ИСЭ). Показано, что оптимальная концентрация ИА в поливинилхлоридной мембране составляет 5 – 11 %. Изучено влияние содержания пластификатора на крутизну электродной функции, ее линейность и нижнюю границу определяемых содержаний диклофенака. Наилучшее соотношение пластификатора к ПВХ составляет (1,0 – 1,5):1. С содержанием пластификатора, очевидно, связано время жизни электрода, которое определяется в основном частотой его использования и в среднем составляет 7,0 – 7,5 месяца. Наилучшие характеристики сенсора были получены с использованием композиции: ионный ассоциат — 7 %, дибутилфталат — 56 %, ПВХ — 37 %. Электрохимический сенсор имеет линейный динамический диапазон 5,0 · 10–4 – 5,0 · 10–2 моль/л и крутизну электродной функции 46,0 мВ/pC с нижним пределом определения 3,2 · 10–5 моль/л, время отклика &lt;15 с и может использоваться в течение как минимум 7 недель. Сенсор также характеризуется высоким коэффициентом селективности по отношению к диклофенаку, простотой в применении и низкой себестоимостью. На основе экспериментальных данных разработан новый метод определения диклофенака, который опробован при анализе модельных растворов и лекарственных препаратов.</p></abstract><trans-abstract xml:lang="en"><p>A new membrane ion-selective electrode (ISE) based on the use of the diclofenac-toluidine blue ion associate (IA) as an electrode substance (EAS) is developed. It is shown that the optimal concentration of IA in the PVC membrane is 5 – 11%. The effect of the plasticizer content on the linearity and steepness of the electrode function, as well as on the lower limit of diclofenac ion determination is studied. The best ratio of a plasticizer to PVC is (1.0 – 1.5):1. The content of the plasticizer is obviously related to the electrode lifetime which is mainly determined by the frequency of usage being 7.0 – 7.5 months on the average. The best sensor characteristics were obtained using the following composition: ion associate — 7%, dibutyl phthalate — 56%, PVC — 37%. The electrochemical sensor has a linear dynamic range of 5.0 Ч 10–4 – 5.0 Ч 10–2 M, electrode slope of 46.0 mV/pc with a lower detection limit of 3.2 Ч 10–5 M, and response time &lt;15 sec. The low-cost sensor is easy to use, exhibits fast response, wide range of the electrode function linearity, high selectivity to diclofenac and can be used for at least seven weeks. The new method of diclofenac determination is developed and tested on model solutions and pharmaceuticals.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>диклофенак</kwd><kwd>ионные ассоциаты</kwd><kwd>ион-селективный электрод</kwd><kwd>потенциометрия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>diclofenac</kwd><kwd>ion-associates</kwd><kwd>ion-selective electrode</kwd><kwd>potentiometry</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">Государственная Фармакопея Украины. 2004. — 672 с.</mixed-citation><mixed-citation xml:lang="en">State Pharmacopoeia of Ukraine. 2004. — 672 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Компендиум 2003. Лекарственные препараты / Под ред. В. Н. Коваленко, А. П. Викторова. — Киев: Морион, 2003. — 1388 с.</mixed-citation><mixed-citation xml:lang="en">Compendium 2003. Medicinal Products / Ed. by V. N. Kovalenko, A. P. Viktorov. — Kiev: Morion, 2003. — 1388 p.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Arcelloni C., Lanzi R., Pedercini S., et al. High-Performance Liquid Chromatographic Determination of Diclofenac in Human Plasma after Solid-Phase Extraction / J. Chromatogr. B. 2001. Vol. 763. P. 195 – 200. DOI: 10.1016/S0378-4347(01) 00383-8.</mixed-citation><mixed-citation xml:lang="en">Arcelloni C., Lanzi R., Pedercini S., et al. High-Performance Liquid Chromatographic Determination of Diclofenac in Human Plasma after Solid-Phase Extraction / J. Chromatogr. B. 2001. Vol. 763. P. 195 – 200. DOI: 10.1016/S0378-4347(01) 00383-8.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Rośkar R., Kmetec V. Liquid chromatographic determination of diclofenac in human synovial fluid / J. Chromatogr. B. 2003. Vol. 788. N 1. P. 57 – 64. DOI: 10.1016/S1570-0232(02)01015-2.</mixed-citation><mixed-citation xml:lang="en">Rośkar R., Kmetec V. Liquid chromatographic determination of diclofenac in human synovial fluid / J. Chromatogr. B. 2003. Vol. 788. N 1. P. 57 – 64. DOI: 10.1016/S1570-0232(02)01015-2.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Tubino M., Souza R. L. Gravimetric method for the determination of diclofenac in pharmaceutical preparations / J. AOAC Int. 2005. Vol. 88. N 6. P. 1684 – 1687.</mixed-citation><mixed-citation xml:lang="en">Tubino M., Souza R. L. Gravimetric method for the determination of diclofenac in pharmaceutical preparations / J. AOAC Int. 2005. Vol. 88. N 6. P. 1684 – 1687.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Sastry C. S. P., Prasad Tipirneni A. S. R., Suryanarayana M. V. Extractive specrophotomeric determination of some anti-inflammatory agents with methylene violet / Analyst. 1989. Vol. 114. P. 513 – 515. DOI: 10.1039/AN9891400513.</mixed-citation><mixed-citation xml:lang="en">Sastry C. S. P., Prasad Tipirneni A. S. R., Suryanarayana M. V. Extractive specrophotomeric determination of some anti-inflammatory agents with methylene violet / Analyst. 1989. Vol. 114. P. 513 – 515. DOI: 10.1039/AN9891400513.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Matin A. A., Farajzadeh M. A., Jouyban A. A simple specrophotometric method for determination of sodium diclofenac in pharmaceutical formulations / Il Farmaco. 2005. Vol. 60. N 10. P. 855 – 858. DOI: 10.1016/j.farmac.2005.05.011.</mixed-citation><mixed-citation xml:lang="en">Matin A. A., Farajzadeh M. A., Jouyban A. A simple specrophotometric method for determination of sodium diclofenac in pharmaceutical formulations / Il Farmaco. 2005. Vol. 60. N 10. P. 855 – 858. DOI: 10.1016/j.farmac.2005.05.011.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Agatonović-Kuštrin S., Živanović Lj., Zečević M., Radulović D. Spectrophotometric study of diclofenac-Fe (III) complex / J. Pharm. Biomed. Anal. 1997. Vol. 16. P. 147 – 153. DOI: 10.1016/S0731-7085(97)00016-2.</mixed-citation><mixed-citation xml:lang="en">Agatonović-Kuštrin S., Živanović Lj., Zečević M., Radulović D. Spectrophotometric study of diclofenac-Fe (III) complex / J. Pharm. Biomed. Anal. 1997. Vol. 16. P. 147 – 153. DOI: 10.1016/S0731-7085(97)00016-2.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Botello J. C., Caballero G. P. Spectrophotometric determination of diclofenac sodium with methylene blue / Talanta. 1995. Vol. 42. N 1. P. 105 – 108. DOI: 10.1016/0039-9140(94)00224-G.</mixed-citation><mixed-citation xml:lang="en">Botello J. C., Caballero G. P. Spectrophotometric determination of diclofenac sodium with methylene blue / Talanta. 1995. Vol. 42. N 1. P. 105 – 108. DOI: 10.1016/0039-9140(94)00224-G.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Souza R. L., Tubino M. Spectrophotometric determination of diclofenac in pharmaceutical preparations / J. Brazil Chem. Soc. 2005. Vol. 16. N 5. Р. 1068 – 1073. DOI: 10.1590/S0103- 50532005000600026.</mixed-citation><mixed-citation xml:lang="en">Souza R. L., Tubino M. Spectrophotometric determination of diclofenac in pharmaceutical preparations / J. Brazil Chem. Soc. 2005. Vol. 16. N 5. P. 1068 – 1073. DOI: 10.1590/S0103- 50532005000600026.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh. O., Hunka I. P., Bazel Ya. R. A new analytical form for the spectrophotometric determination of low levels of diclofenac / Methods and objects of chemical analysis. 2007. Vol. 2. N 1. P. 76 – 81.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh. O., Hunka I. P., Bazel Ya. R. A new analytical form for the spectrophotometric determination of low levels of diclofenac / Methods and objects of chemical analysis. 2007. Vol. 2. N 1. P. 76 – 81.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Kousy N. M. Spectrophotometric and specrtofluorometric determination of etodolac and aceclofenac / J. Pharm. Biomed. Anal. 1999. Vol. 20. N 1 – 2. P. 185 – 194. DOI: 10.1016/S0731- 7085(99)00019-9.</mixed-citation><mixed-citation xml:lang="en">Kousy N. M. Spectrophotometric and specrtofluorometric determination of etodolac and aceclofenac / J. Pharm. Biomed. Anal. 1999. Vol. 20. N 1 – 2. P. 185 – 194. DOI: 10.1016/S0731- 7085(99)00019-9.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Arancibia J. A., Boldrini M. A., Escandar G. M. Spectrofluorimetric determination of diclofenac in the presence of α-cyclodextrin / Talanta. 2000. Vol. 52. N 2. P. 261 – 268. DOI: 10.1016/ S0039 – 9140(00)00338 – 6.</mixed-citation><mixed-citation xml:lang="en">Arancibia J. A., Boldrini M. A., Escandar G. M. Spectrofluorimetric determination of diclofenac in the presence of α-cyclodextrin / Talanta. 2000. Vol. 52. N 2. P. 261 – 268. DOI: 10.1016/S0039 – 9140(00)00338 – 6.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Damiani P. C., Bearzotti M., Cabezón M. A., Olivieri A. C. Specrtofluorimetric determination of diclofenac in tablets and ointment / J. Pharm. Biomed. Anal. 1999. Vol. 20. N 3. P. 587 – 590. DOI: 10.1016/S0731-7085(99)00052-7.</mixed-citation><mixed-citation xml:lang="en">Damiani P. C., Bearzotti M., Cabezón M. A., Olivieri A. C. Specrtofluorimetric determination of diclofenac in tablets and ointment / J. Pharm. Biomed. Anal. 1999. Vol. 20. N 3. P. 587 – 590. DOI: 10.1016/S0731-7085(99)00052-7.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Кормош Ж. А., Гунька И. П., Базель Я. Р. Ион-селективный сенсор для определения диклофенака в фармпрепаратах / Хим.-фарм. журн. 2009. Т. 43. № 7. С. 54 – 56. DOI: 10.30906/0023-1134-2009-43-7-54-56.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh. A., Hunka I. P., Bazel Y. R. An ion-selective sensor for assay of diclofenac in medicines / Pharm. Chem. J. 2009. Vol. 43. N 7. P. 428 – 430. DOI: 10.1007/s11094-009- 0311-2.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Carreira L. A., Rizk M., El-Shabrawy Y. Europium (III) ion probe spectrofluorometric determination of diclofenac sodium / J. Pharm. Biomed. Anal. 1995. Vol. 13. N 11. P. 1331 – 1337. DOI: 10.1016/0731-7085(95)01567-5.</mixed-citation><mixed-citation xml:lang="en">Carreira L. A., Rizk M., El-Shabrawy Y. Europium (III) ion probe spectrofluorometric determination of diclofenac sodium / J. Pharm. Biomed. Anal. 1995. Vol. 13. N 11. P. 1331 – 1337. DOI: 10.1016/0731-7085(95)01567-5.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Shamsipur M., Jalali F., Ershad S. Preparation of a diclofenac potentiometric sensor and its application analysis and to drug recovery from biological fluids / J. Pharm. Biomed. Anal. 2005. Vol. 37. N 5. P. 943 – 947. DOI: 10.1016/j.jpba.2004. 07.051.</mixed-citation><mixed-citation xml:lang="en">Shamsipur M., Jalali F., Ershad S. Preparation of a diclofenac potentiometric sensor and its application analysis and to drug recovery from biological fluids / J. Pharm. Biomed. Anal. 2005. Vol. 37. N 5. P. 943 – 947. DOI: 10.1016/j.jpba.2004. 07.051.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Santini A. O., Pezza H. R., Pezza L. Determination of diclofenac in pharmaceutical preparations using a potentiometric sensor immobilized in a graphite matrix / Talanta. 2006. Vol. 68. N 3. P. 636 – 642. DOI: 10.1016/j.talanta.2005.05.016.</mixed-citation><mixed-citation xml:lang="en">Santini A. O., Pezza H. R., Pezza L. Determination of diclofenac in pharmaceutical preparations using a potentiometric sensor immobilized in a graphite matrix / Talanta. 2006. Vol. 68. N 3. P. 636 – 642. DOI: 10.1016/j.talanta.2005.05.016.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Hassan S. S. M., Mahmoud W. H., Elmosallam M. A. F., Almarzooqi M. H. Iron (II)-phthalocyanine as a novel recognition sensor for selective potentiometric determination of diclofenac and warfarin drugs / J. Pharm. Biomed. Anal. 2005. Vol. 39. N 1 – 2. P. 315 – 321. DOI: 10.1016/j.jpba.2005.03.027.</mixed-citation><mixed-citation xml:lang="en">Hassan S. S. M., Mahmoud W. H., Elmosallam M. A. F., Almarzooqi M. H. Iron (II)-phthalocyanine as a novel recognition sensor for selective potentiometric determination of diclofenac and warfarin drugs / J. Pharm. Biomed. Anal. 2005. Vol. 39. N 1 – 2. P. 315 – 321. DOI: 10.1016/j.jpba.2005.03.027.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh., Hunka I., Bazel Ya., et al. Determination of diclofenac in pharmaceuticals and urine samples using a membrane sensor based on the ion associate of diclofenac with Rhodamine B / Cent. Eur. J. Chem. 2007. Vol. 5. N 3. P. 813 – 823. DOI: 10.2478/s11532-007-0024-x.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh., Hunka I., Bazel Ya., et al. Determination of diclofenac in pharmaceuticals and urine samples using a membrane sensor based on the ion associate of diclofenac with Rhodamine B / Cent. Eur. J. Chem. 2007. Vol. 5. N 3. P. 813 – 823. DOI: 10.2478/s11532-007-0024-x.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh., Hunka I., Bazel Ya. Spectrophotometric determination of ketoprofen and its application in pharmaceutical analysis / Acta Poloniae Pharmaceutica — Drug Research. 2009. Vol. 66. N 1. P. 3 – 9.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh., Hunka I., Bazel Ya. Spectrophotometric determination of ketoprofen and its application in pharmaceutical analysis / Acta Poloniae Pharmaceutica — Drug Research. 2009. Vol. 66. N 1. P. 3 – 9.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh., Hunka I., Bazel Y. Potentiometric sensor for the indomethacin determination / Mater. Sci. Eng. C. 2009. Vol. 29. P. 1018 – 1022. DOI: 10.1016/j.msec.2008.09.003.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh., Hunka I., Bazel Y. Potentiometric sensor for the indomethacin determination / Mater. Sci. Eng. C. 2009. Vol. 29. P. 1018 – 1022. DOI: 10.1016/j.msec.2008.09.003.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Кормош Ж. А., Гунька И. П., Базель Я. Р. Потенциометрический сенсор для определения диклофенака / Журн. аналит. химии. 2009. Т. 64. № 8. С. 875 – 880. DOI: 10.1134/ S1061934809080140.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh. A., Hunka I. P., Bazel Ya. R. A Potentiometric Sensor for the Determination of Diclofenac / J. Anal. Chem. 2009. Vol. 64. N 8. P. 853 – 858. DOI: 10.1134/ S1061934809080140.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh., Savchuk T., Korolchuk S., Bazel Ya. Design and application of triiodide-selective membrane electrode / Electroanalysis. 2011. Vol. 23. № 9. P. 2144 – 2147. DOI: 10.1002/elan.201000737 Matviychuk O. Potentiometric determination of mefenamic acid in pharmaceutical formulation by membrane sensor based on ion-pair with basic dye / Chin. Chem. Lett. 2013. Vol. 24. N 4. P. 315 – 317. DOI:.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh., Savchuk T., Korolchuk S., Bazel Ya. Design and application of triiodide-selective membrane electrode / Electroanalysis. 2011. Vol. 23. N 9. P. 2144 – 2147. DOI: 10.1002/ elan.201000737.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh., 10.1016/j.cclet.2013. 03.001.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh., Matviychuk O. Potentiometric determination of mefenamic acid in pharmaceutical formulation by membrane sensor based on ion-pair with basic dye / Chin. Chem. Lett. 2013. Vol. 24. N 4. P. 315 – 317. DOI: 10.1016/j.cclet.2013. 03.001.</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Kormosh Zh. A., Savchuk T. I., Bazel Ya. R. The potentiometric sensor for determination of pentachlorophenol in Water / J. Water Chem. Technol. 2013. Vol. 32. N 4. З. 152 – 158. DOI: 10.3103/S1063455X13040024.</mixed-citation><mixed-citation xml:lang="en">Kormosh Zh. A., Savchuk T. I., Bazel Ya. R. The potentiometric sensor for determination of pentachlorophenol in Water / J. Water Chem. Technol. 2013. Vol. 32. N 4. P. 152 – 158. DOI: 10.3103/S1063455X13040024.</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Байулеску Г., Кошофрец В. Применение ион-селективных мембранных электродов в органическом анализе: пер. с англ. — М.: Мир, 1980. — 230 с.</mixed-citation><mixed-citation xml:lang="en">Bayulesku G., Koshofrets V. Application of ion-selective membrane electrodes in organic analysis. — Moscow: Mir, 1980. — 230 p. [Russian translation].</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Камман К. Робота с ионоселективными электродами: пер. с нем. — М.: Мир, 1980. — 283 с.</mixed-citation><mixed-citation xml:lang="en">Camman K. Work with ion-selective electrodes. — Moscow: Mir, 1980. — 283 p. [Russian translation].</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Морф В. Принципы роботы ионоселективных электродов и мембранный транспорт: пер. с англ. — М.: Мир, 1985. — 280 с.</mixed-citation><mixed-citation xml:lang="en">Morf W. E. The principles of ion-selective electrodes and of membrane transport. — Budapest: Akademiai Kiado, 1981.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Кулапина Е. Г., Баритонова О. В. Ионоселективные электроды для определения азотосодержащих лекарственных средств / Журн. аналит. химии. 2001. Т. 56. № 5. С. 518 – 522. DOI: 10.1023/A:1016683121191.</mixed-citation><mixed-citation xml:lang="en">Kulapina E. G., Baritonova O. V. Ion-selective electrodes for determination of nitrogen-containing medicines / J. Anal. Chem. 2001. Vol. 56. N 5. P. 457 – 460. DOI: 10.1023/A: 1016683121191.</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Нижникова Е. В., Подтероб А. П. Определение растворимости солей физиологически активных аминов потенциометрическим методом / Хим.-фарм. журн. 2004. Т. 38. № 9. С. 40 – 42.</mixed-citation><mixed-citation xml:lang="en">Nyzhnikova E. V., Podterob A. P. Potentiometric determination of solubilities of physiologically active amine salts / Pharm. Chem. J. 2004. Vol. 38. N 9. P. 504 – 507. DOI: 10.1007/s11094- 004-009-4.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
