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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-117</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>***</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>***</subject></subj-group></article-categories><title-group><article-title>СПЕКТРОФОТОМЕТРИЧЕСКОЕ ОПРЕДЕЛЕНИЕ РИФАМПИЦИНА В ОБЪЕМНОЙ ЛЕКАРСТВЕННОЙ ФОРМЕ НА ОСНОВЕ РЕДОКСА И ОБРАЗОВАНИЯ КОМПЛЕКСОВ</article-title><trans-title-group xml:lang="en"><trans-title>SPECTROPHOTOMETRIC DETERMINATION OF RIFAMPICIN IN BULK DRUG AND PHARMACEUTICAL FORMULATIONS BASED ON REDOX AND COMPLEXATION REACTIONS</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>Swamy</surname><given-names>N. .</given-names></name><name name-style="western" xml:lang="en"><surname>Swamy</surname><given-names>N. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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>Basavaiah</surname><given-names>K. .</given-names></name><name name-style="western" xml:lang="en"><surname>Basavaiah</surname><given-names>K. .</given-names></name></name-alternatives><email xlink:type="simple">kanakapurabasavaiah@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Майсyр</institution><country>Россия</country></aff><aff xml:lang="en"><institution>University of Mysore</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>84</volume><issue>4</issue><elocation-id>669(1)-669(10)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Swamy N..., Basavaiah K..., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Swamy N..., Basavaiah K...</copyright-holder><copyright-holder xml:lang="en">Swamy N..., Basavaiah K...</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/117">https://zhps.ejournal.by/jour/article/view/117</self-uri><abstract><p>Разработаны и протестированы два спектрофотометрических метода определения рифампицина (RIF) в объеме, составе и отдельной порции человеческой урины. Первый метод основан на восстановлении реагента Folin-Ciocalteu (FC) RIF с образованием синего хромогена с lmax = 760 нм (метод FCR). Во втором методе железо(III) восстанавливают с помощью RIF в нейтральной среде; полученное железо(II) образует комплекс с феррицианидом с максимумом l = 750 нм (метод FFC). В оптимальных условиях методы FCR и FFC позволяют определить концентрацию препарата в диапазонах 1-35 и 2.5-50 мкг/мл с молярной поглощательной способностью 2.72×104 и 1.63×104 л/(моль × см). Оценены чувствительность Санделла, пределы детектирования (LOD) и измерения (LOQ). Точность методов (погрешность &lt;2%) удовлетворительная. Предложенные методы успешно использованы для определения лекарства в капсулах и человеческой моче. Статистический анализ показывает отсутствие существенных различий между результатами, полученными разработанными методами и официально используемым методом. </p></abstract><trans-abstract xml:lang="en"><p>Two spectrophotometric methods were developed and validated for the determination of rifampicin (RIF) in bulk form, formulations, and spiked human urine. The first method is based on the reduction of the Folin-Ciocalteu (FC) reagent by RIF to form a blue colored chromogen with lmax at 760 nm (the FCR method). In the second method, iron(III) is reduced by RIF in a neutral medium, and the resulting iron(II) is complexed with ferricyanide to form a Prussian blue peaking at 750 nm (the FFC method). Under optimum conditions, Beer’s law enabled the determination of the drug in the concentration ranges 1-35 and 2.5-50 µg/mL with apparent molar absorptivities of 2.72×104 and 1.63×104 L/(mol × cm) for the FCR and FFC methods, respectively. The Sandell sensitivity, limits of detection (LOD), and quantification (LOQ) values were also reported for both methods. The precision of the methods, with % RSD of &lt; 2%, was satisfactory, and the accuracy was higher than 2% (RE). The proposed methods were successfully applied to the determination of drug in capsules without interference from common additives and spiked human urine without interference from endogenous substances. A statistical analysis indicated that there was no significant difference between the results obtained by the developed methods and the official method. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>рифампицин</kwd><kwd>анализ</kwd><kwd>спектрофотометрия</kwd><kwd>реагент FC</kwd><kwd>феррицианид</kwd><kwd>rifampicin</kwd><kwd>assay</kwd><kwd>spectrophotometry</kwd><kwd>FC reagent</kwd><kwd>ferricyanide</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">British Pharmacopoeia Communication, British Pharmacopoeia, Her Majesty’s Stationery Office, London (2000) 1346-1347.</mixed-citation><mixed-citation xml:lang="en">British Pharmacopoeia Communication, British Pharmacopoeia, Her Majesty’s Stationery Office, London (2000) 1346-1347.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">European Pharmacopoeia Commission, European Pharmacopoeia, Council of Europe Strasbourg (1997) 1446-1447.</mixed-citation><mixed-citation xml:lang="en">European Pharmacopoeia Commission, European Pharmacopoeia, Council of Europe Strasbourg (1997) 1446-1447.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">P. F. Barnes, S. A. Barrows, Ann. Intern. Med., 119, 400-410 (1993).</mixed-citation><mixed-citation xml:lang="en">P. F. Barnes, S. A. Barrows, Ann. Intern. Med., 119, 400-410 (1993).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">S. Oldfield, J. D. Berg, H. J. Stiles, B. M. Buckley, J. Chromatogr., 377, 423-429 (1986).</mixed-citation><mixed-citation xml:lang="en">S. Oldfield, J. D. Berg, H. J. Stiles, B. M. Buckley, J. Chromatogr., 377, 423-429 (1986).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">A. B. M. Jamaluddin, G. Sarwar, M. A. Rahim, M. K. Rahman, J. Chromatogr., 525, 495-497 (1990).</mixed-citation><mixed-citation xml:lang="en">A. B. M. Jamaluddin, G. Sarwar, M. A. Rahim, M. K. Rahman, J. Chromatogr., 525, 495-497 (1990).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">J. M. Finkel, R. F. Pittillo, L. B. Mellett, Chemotherapy, 16, 380-388 (1971).</mixed-citation><mixed-citation xml:lang="en">J. M. Finkel, R. F. Pittillo, L. B. Mellett, Chemotherapy, 16, 380-388 (1971).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">M. Y. Khuhawar, F. M. A. Rind, J. Chromatogr. B, 766, 357-363 (2002).</mixed-citation><mixed-citation xml:lang="en">M. Y. Khuhawar, F. M. A. Rind, J. Chromatogr. B, 766, 357-363 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">A. Walubo, P. Smith, P. I. Folb, J. Chromatogr. B, 658, 391-396 (1994).</mixed-citation><mixed-citation xml:lang="en">A. Walubo, P. Smith, P. I. Folb, J. Chromatogr. B, 658, 391-396 (1994).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">A. A. Salem, H. A. Mossa, B. N. Barsoum, Spectrochim. Acta A, 62, 466-472 (2005).</mixed-citation><mixed-citation xml:lang="en">A. A. Salem, H. A. Mossa, B. N. Barsoum, Spectrochim. Acta A, 62, 466-472 (2005).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">E. Hammam, A. M. Beltagi, M. M. Ghoneim, Microchem. J., 77, 53-62 (2004).</mixed-citation><mixed-citation xml:lang="en">E. Hammam, A. M. Beltagi, M. M. Ghoneim, Microchem. J., 77, 53-62 (2004).</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">S. Sadeghi, E. Karimi, Chem. Pharm. Bull., 54, 1107-1112 (2006).</mixed-citation><mixed-citation xml:lang="en">S. Sadeghi, E. Karimi, Chem. Pharm. Bull., 54, 1107-1112 (2006).</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, Indian Drugs, 22, 604-606 (1985).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, Indian Drugs, 22, 604-606 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Indian Pharmacopoeia, 4th ed., Vol. 1, Controller of Publications, New Delhi (1996).</mixed-citation><mixed-citation xml:lang="en">Indian Pharmacopoeia, 4th ed., Vol. 1, Controller of Publications, New Delhi (1996).</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">G. C. Hector, O. C. Alejandro, J. Pharm. Biomed. Anal., 20, 681-686 (1999).</mixed-citation><mixed-citation xml:lang="en">G. C. Hector, O. C. Alejandro, J. Pharm. Biomed. Anal., 20, 681-686 (1999).</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. Espinosa, V. M. I. Acedo, D. P. A. Muñoz, F. Salinas, C. F. Cañada, Anal. Chim. Acta., 427, 129-136 (2001).</mixed-citation><mixed-citation xml:lang="en">M. A. Espinosa, V. M. I. Acedo, D. P. A. Muñoz, F. Salinas, C. F. Cañada, Anal. Chim. Acta., 427, 129-136 (2001).</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">L. F. Marcellos, A. F. Faria, M. V. N. Souza, M. R. Almeida, G. P. Sabin, R. J. Poppi, M. A. L. Oliveira, Cent. Eur. J. Chem., 10, 1808-1816 (2012).</mixed-citation><mixed-citation xml:lang="en">L. F. Marcellos, A. F. Faria, M. V. N. Souza, M. R. Almeida, G. P. Sabin, R. J. Poppi, M. A. L. Oliveira, Cent. Eur. J. Chem., 10, 1808-1816 (2012).</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">N. B. Barsoum, M. S. Kamel, M. M. A. Diab, Res. J. Agric. Biol. Sci., 4, 471-484 (2008).</mixed-citation><mixed-citation xml:lang="en">N. B. Barsoum, M. S. Kamel, M. M. A. Diab, Res. J. Agric. Biol. Sci., 4, 471-484 (2008).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">R. B. Kakde, A. V. Kasture, S. G. Wadodkar, Indian J. Pharm. Sci., 64, 24-27 (2002).</mixed-citation><mixed-citation xml:lang="en">R. B. Kakde, A. V. Kasture, S. G. Wadodkar, Indian J. Pharm. Sci., 64, 24-27 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">S. A. Benetton, E. R. M. Kedor-Hackmann, M. I. R. M. Santoro, V. M. Borges, Talanta, 47, 639-643 (1998).</mixed-citation><mixed-citation xml:lang="en">S. A. Benetton, E. R. M. Kedor-Hackmann, M. I. R. M. Santoro, V. M. Borges, Talanta, 47, 639-643 (1998).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">A. R. Rote, A. K. Sharma, Indian J. Pharm. Sci., 59, 119-123 (1997).</mixed-citation><mixed-citation xml:lang="en">A. R. Rote, A. K. Sharma, Indian J. Pharm. Sci., 59, 119-123 (1997).</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">M. Y. Rasha, M. M. Hadir, Spectrochim. Acta, A, 70, 1152-1166 (2008).</mixed-citation><mixed-citation xml:lang="en">M. Y. Rasha, M. M. Hadir, Spectrochim. Acta, A, 70, 1152-1166 (2008).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">S. Gunasekaran, E. Sailatha, Asian J. Chem., 21, 3561-3566 (2009).</mixed-citation><mixed-citation xml:lang="en">S. Gunasekaran, E. Sailatha, Asian J. Chem., 21, 3561-3566 (2009).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">E. Calleri, E. De Lorenzi, S. Furlanetto, G. Massolini, G. Caccialanza, J. Pharm. Biomed. Anal., 29, 1089-1096 (2002).</mixed-citation><mixed-citation xml:lang="en">E. Calleri, E. De Lorenzi, S. Furlanetto, G. Massolini, G. Caccialanza, J. Pharm. Biomed. Anal., 29, 1089-1096 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">669-10 D. H. Shewiyoa, E. Kaaleb, P. G. Rishab, B. Dejaegherc, V. J. Smeyers, H. Y. Vander, J. Chromatogr. A, 1260, 232-238 (2012).</mixed-citation><mixed-citation xml:lang="en">669-10 D. H. Shewiyoa, E. Kaaleb, P. G. Rishab, B. Dejaegherc, V. J. Smeyers, H. Y. Vander, J. Chromatogr. A, 1260, 232-238 (2012).</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">J. Ali, N. Ali, Y. Sultana, S. Baboota, S. Faiyaz, Acta Chromatogr., 18, 168-179 (2007).</mixed-citation><mixed-citation xml:lang="en">J. Ali, N. Ali, Y. Sultana, S. Baboota, S. Faiyaz, Acta Chromatogr., 18, 168-179 (2007).</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">T. Wahdan, Chem. Anal. (Warsaw), 50, 457-464 (2005).</mixed-citation><mixed-citation xml:lang="en">T. Wahdan, Chem. Anal. (Warsaw), 50, 457-464 (2005).</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. L. Alonso, O.R. Dominguez, M. J. M. Arcos, Anal. Chim. Acta, 449,167-177 (2001).</mixed-citation><mixed-citation xml:lang="en">M. A. L. Alonso, O.R. Dominguez, M. J. M. Arcos, Anal. Chim. Acta, 449,167-177 (2001).</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">A. Z. Karim, S. A. Payam, Electrochim. Acta, 55, 6570-6576 (2010).</mixed-citation><mixed-citation xml:lang="en">A. Z. Karim, S. A. Payam, Electrochim. Acta, 55, 6570-6576 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">L. Baoxin, H. Yuezhen, L. Jiagen, Z. Zhujun, Anal. Bioanal. Chem., 383, 817-824 (2005).</mixed-citation><mixed-citation xml:lang="en">L. Baoxin, H. Yuezhen, L. Jiagen, Z. Zhujun, Anal. Bioanal. Chem., 383, 817-824 (2005).</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">S. A. Halvatzis, P. M. M. Timotheou, T. P. Hadjiioannou, Anal. Chim. Acta, 272, 251-263 (1993).</mixed-citation><mixed-citation xml:lang="en">S. A. Halvatzis, P. M. M. Timotheou, T. P. Hadjiioannou, Anal. Chim. Acta, 272, 251-263 (1993).</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. A. Alonso, J. M. Kauffmann, M. J. M. Arcos, Biosens. Bioelectron., 18, 1165-1171 (2003).</mixed-citation><mixed-citation xml:lang="en">M. A. A. Alonso, J. M. Kauffmann, M. J. M. Arcos, Biosens. Bioelectron., 18, 1165-1171 (2003).</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">H. Younghee, S. Sunmi, Arch. Pharm. Res., 24, 100-104 (2001).</mixed-citation><mixed-citation xml:lang="en">H. Younghee, S. Sunmi, Arch. Pharm. Res., 24, 100-104 (2001).</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. A. Lomillo, O. D. Renedo, M. J. A. Martinez, Helv. Chim. Acta, 85, 2430-2439 (2002).</mixed-citation><mixed-citation xml:lang="en">M. A. A. Lomillo, O. D. Renedo, M. J. A. Martinez, Helv. Chim. Acta, 85, 2430-2439 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">A. A. Salem, H. A. Mossab, B. N. Barsoum, Spectrochim. Acta A, 62, 466-472 (2005).</mixed-citation><mixed-citation xml:lang="en">A. A. Salem, H. A. Mossab, B. N. Barsoum, Spectrochim. Acta A, 62, 466-472 (2005).</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">M. Yong, Z. Bo-Tao, Z. Li-Xia, G. Guang-Sheng, L. Jin-Ming, Chin. J. Chem., 26, 905-910 (2008).</mixed-citation><mixed-citation xml:lang="en">M. Yong, Z. Bo-Tao, Z. Li-Xia, G. Guang-Sheng, L. Jin-Ming, Chin. J. Chem., 26, 905-910 (2008).</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">M. G. Shereen, M. B. Salah, M. E. Abdel-Hamid, Anal. Lett., 25, 725-743 (1992).</mixed-citation><mixed-citation xml:lang="en">M. G. Shereen, M. B. Salah, M. E. Abdel-Hamid, Anal. Lett., 25, 725-743 (1992).</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, Indian J. Pharm. Sci., 47, 45-46 (1985).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, Indian J. Pharm. Sci., 47, 45-46 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">I. C. Shukla, P. K. Dwivedi, S. Kumar, B. K. Singh, A. Dubey, J. Indian Chem. Soc., 84, 100-102 (2007).</mixed-citation><mixed-citation xml:lang="en">I. C. Shukla, P. K. Dwivedi, S. Kumar, B. K. Singh, A. Dubey, J. Indian Chem. Soc., 84, 100-102 (2007).</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, J. Inst. Chem. (India), 58, 17-18 (1986).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, T. E. Divakar, U. V. Prasad, J. Inst. Chem. (India), 58, 17-18 (1986).</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">G. R. Rao, S. S. N. Murty, E. V. Rao, Indian Drugs, 22, 484-488 (1985).</mixed-citation><mixed-citation xml:lang="en">G. R. Rao, S. S. N. Murty, E. V. Rao, Indian Drugs, 22, 484-488 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">T. E. Divakar, U. V. Prasad, C. S. P. Sastry, Indian Drugs, 22, 328-329 (1985).</mixed-citation><mixed-citation xml:lang="en">T. E. Divakar, U. V. Prasad, C. S. P. Sastry, Indian Drugs, 22, 328-329 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">B. S. Reddy, C. S. P. Sastry, J. Inst. Chem. (India), 55, 69-70 (1983).</mixed-citation><mixed-citation xml:lang="en">B. S. Reddy, C. S. P. Sastry, J. Inst. Chem. (India), 55, 69-70 (1983).</mixed-citation></citation-alternatives></ref><ref id="cit43"><label>43</label><citation-alternatives><mixed-citation xml:lang="ru">T. P. Gandhi, A. A. Patel, P. R. Patel, V. C. Patel, Indian Drugs, 16, 10-12 (1978).</mixed-citation><mixed-citation xml:lang="en">T. P. Gandhi, A. A. Patel, P. R. Patel, V. C. Patel, Indian Drugs, 16, 10-12 (1978).</mixed-citation></citation-alternatives></ref><ref id="cit44"><label>44</label><citation-alternatives><mixed-citation xml:lang="ru">T. E. Divakar, S. Sunitha, G. K. Deepthi, T. Benzamin, N. P. Babu, Int. J. Chem. Environ. Pharm. Res., 3, 64-67 (2012).</mixed-citation><mixed-citation xml:lang="en">T. E. Divakar, S. Sunitha, G. K. Deepthi, T. Benzamin, N. P. Babu, Int. J. Chem. Environ. Pharm. Res., 3, 64-67 (2012).</mixed-citation></citation-alternatives></ref><ref id="cit45"><label>45</label><citation-alternatives><mixed-citation xml:lang="ru">M. Pesez, J. Bartos, Colorimetric and Fluorimetric Analysis of Organic Compounds and Drugs, Inc. New York (1974) 83.</mixed-citation><mixed-citation xml:lang="en">M. Pesez, J. Bartos, Colorimetric and Fluorimetric Analysis of Organic Compounds and Drugs, Inc. New York (1974) 83.</mixed-citation></citation-alternatives></ref><ref id="cit46"><label>46</label><citation-alternatives><mixed-citation xml:lang="ru">P. J. Ramesh, K. Basavaiah, N. Rajendraprasad, Acta. Pharm., 60, 445-454 (2010).</mixed-citation><mixed-citation xml:lang="en">P. J. Ramesh, K. Basavaiah, N. Rajendraprasad, Acta. Pharm., 60, 445-454 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit47"><label>47</label><citation-alternatives><mixed-citation xml:lang="ru">N. Swamy, K. N. Prashanth, K. Basavaiah, ISRN Anal. Chem., 2014, 1-11 (2014).</mixed-citation><mixed-citation xml:lang="en">N. Swamy, K. N. Prashanth, K. Basavaiah, ISRN Anal. Chem., 2014, 1-11 (2014).</mixed-citation></citation-alternatives></ref><ref id="cit48"><label>48</label><citation-alternatives><mixed-citation xml:lang="ru">K. Basavaiah, H. C. Prameela, East. Pharm., 1, 61-63 (2002).</mixed-citation><mixed-citation xml:lang="en">K. Basavaiah, H. C. Prameela, East. Pharm., 1, 61-63 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit49"><label>49</label><citation-alternatives><mixed-citation xml:lang="ru">K. Basavaiah, H. C. Prameela, Farmaco, 57, 443-449 (2002).</mixed-citation><mixed-citation xml:lang="en">K. Basavaiah, H. C. Prameela, Farmaco, 57, 443-449 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit50"><label>50</label><citation-alternatives><mixed-citation xml:lang="ru">K. Senthilkumar, B. Manasa, E. Nagamani, G.V. Manoj, E. Mahesh, B. Sudhakar, T. V. Narayana, Int. J. Res. Pharm. Chem., 2, 809-815 (2012).</mixed-citation><mixed-citation xml:lang="en">K. Senthilkumar, B. Manasa, E. Nagamani, G.V. Manoj, E. Mahesh, B. Sudhakar, T. V. Narayana, Int. J. Res. Pharm. Chem., 2, 809-815 (2012).</mixed-citation></citation-alternatives></ref><ref id="cit51"><label>51</label><citation-alternatives><mixed-citation xml:lang="ru">N. P. Sadler, H. Jacobs, Talanta, 42, 1385-1388 (1995).</mixed-citation><mixed-citation xml:lang="en">N. P. Sadler, H. Jacobs, Talanta, 42, 1385-1388 (1995).</mixed-citation></citation-alternatives></ref><ref id="cit52"><label>52</label><citation-alternatives><mixed-citation xml:lang="ru">A. V. Prasad, P. A. Devi, C. S. P. Sastry, U. V. Prasad, East. Pharm., 2, 67-68 (2003).</mixed-citation><mixed-citation xml:lang="en">A. V. Prasad, P. A. Devi, C. S. P. Sastry, U. V. Prasad, East. Pharm., 2, 67-68 (2003).</mixed-citation></citation-alternatives></ref><ref id="cit53"><label>53</label><citation-alternatives><mixed-citation xml:lang="ru">T. K. Murthy, G. D. Sankar, Y. S. Rao, Indian Drugs, 39, 230-233 (2002).</mixed-citation><mixed-citation xml:lang="en">T. K. Murthy, G. D. Sankar, Y. S. Rao, Indian Drugs, 39, 230-233 (2002).</mixed-citation></citation-alternatives></ref><ref id="cit54"><label>54</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, J. S. V. M. Lingeswara-Rao, Anal. Lett., 29, 1763-1768 (1996).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, J. S. V. M. Lingeswara-Rao, Anal. Lett., 29, 1763-1768 (1996).</mixed-citation></citation-alternatives></ref><ref id="cit55"><label>55</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, P. Y. Naidu, S. S. N. Murthy, Talanta, 44, 1211-1217 (1997).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, P. Y. Naidu, S. S. N. Murthy, Talanta, 44, 1211-1217 (1997).</mixed-citation></citation-alternatives></ref><ref id="cit56"><label>56</label><citation-alternatives><mixed-citation xml:lang="ru">C. S. P. Sastry, A. Sailaja, T. T. Rao, D. M. Krishna, Talanta, 39 , 709-713 (1992).</mixed-citation><mixed-citation xml:lang="en">C. S. P. Sastry, A. Sailaja, T. T. Rao, D. M. Krishna, Talanta, 39 , 709-713 (1992).</mixed-citation></citation-alternatives></ref><ref id="cit57"><label>57</label><citation-alternatives><mixed-citation xml:lang="ru">S. Raghuveer, A. B. Avadhanulu, A. R. Pantulu, East. Pharm., 35, 129-130 (1992).</mixed-citation><mixed-citation xml:lang="en">S. Raghuveer, A. B. Avadhanulu, A. R. Pantulu, East. Pharm., 35, 129-130 (1992).</mixed-citation></citation-alternatives></ref><ref id="cit58"><label>58</label><citation-alternatives><mixed-citation xml:lang="ru">O. Folin, D. Ciocalteu, J. Biol. Chem., 73, 627-650 (1927).</mixed-citation><mixed-citation xml:lang="en">O. Folin, D. Ciocalteu, J. Biol. Chem., 73, 627-650 (1927).</mixed-citation></citation-alternatives></ref><ref id="cit59"><label>59</label><citation-alternatives><mixed-citation xml:lang="ru">G. L. Peterson, Anal. Biochem., 100, 201-220 (1979).</mixed-citation><mixed-citation xml:lang="en">G. L. Peterson, Anal. Biochem., 100, 201-220 (1979).</mixed-citation></citation-alternatives></ref><ref id="cit60"><label>60</label><citation-alternatives><mixed-citation xml:lang="ru">R. I. Buckley, R. J. H. Clark, Coord. Chem. Rev., A, 65, 167-218 (1985).</mixed-citation><mixed-citation xml:lang="en">R. I. Buckley, R. J. H. Clark, Coord. Chem. Rev., A, 65, 167-218 (1985).</mixed-citation></citation-alternatives></ref><ref id="cit61"><label>61</label><citation-alternatives><mixed-citation xml:lang="ru">C. Samchez, L. Livage, J. Launay, M. Fourneir, Y. Jeannin, J. Am. Chem. Soc., 104, 3194 (1982).</mixed-citation><mixed-citation xml:lang="en">C. Samchez, L. Livage, J. Launay, M. Fourneir, Y. Jeannin, J. Am. Chem. Soc., 104, 3194 (1982).</mixed-citation></citation-alternatives></ref><ref id="cit62"><label>62</label><citation-alternatives><mixed-citation xml:lang="ru">D. L. Massart, B. G. M. Vandeginste, S. N. Deming, Y. Michotte, L. Kauffmann, Chemometrics; A Textbook, Anterdam, Elsevier, p. 80, 293 (1988).</mixed-citation><mixed-citation xml:lang="en">D. L. Massart, B. G. M. Vandeginste, S. N. Deming, Y. Michotte, L. Kauffmann, Chemometrics; A Textbook, Anterdam, Elsevier, p. 80, 293 (1988).</mixed-citation></citation-alternatives></ref><ref id="cit63"><label>63</label><citation-alternatives><mixed-citation xml:lang="ru">L. Guo, Y. Zhang, Q. Li, Anal. Sci., 25, 1451 (2009).</mixed-citation><mixed-citation xml:lang="en">L. Guo, Y. Zhang, Q. Li, Anal. Sci., 25, 1451 (2009).</mixed-citation></citation-alternatives></ref><ref id="cit64"><label>64</label><citation-alternatives><mixed-citation xml:lang="ru">O. Zenita Devi, K. Basavaiah, Chemtech, 2, 624-632 (2010).</mixed-citation><mixed-citation xml:lang="en">O. Zenita Devi, K. Basavaiah, Chemtech, 2, 624-632 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit65"><label>65</label><citation-alternatives><mixed-citation xml:lang="ru">K. B. Vinay, H. D. Revanasiddappa, O. Zenita Devi, K. Basavaiah, Chem. Ind. Chem. Eng. Quar., 16, 1-9 (2010).</mixed-citation><mixed-citation xml:lang="en">K. B. Vinay, H. D. Revanasiddappa, O. Zenita Devi, K. Basavaiah, Chem. Ind. Chem. Eng. Quar., 16, 1-9 (2010).</mixed-citation></citation-alternatives></ref><ref id="cit66"><label>66</label><citation-alternatives><mixed-citation xml:lang="ru">P. J. Ramesh, K. Basavaiah, N. Rajendraprasad, O. Zenita Devi, K. B. Vinay, J. Appl. Spectrosc., 78, 383-391 (2012).</mixed-citation><mixed-citation xml:lang="en">P. J. Ramesh, K. Basavaiah, N. Rajendraprasad, O. Zenita Devi, K. B. Vinay, J. Appl. Spectrosc., 78, 383-391 (2012).</mixed-citation></citation-alternatives></ref><ref id="cit67"><label>67</label><citation-alternatives><mixed-citation xml:lang="ru">V. R. Murthy, M. L. N. Acharyulu, B. V. Srinivas, T. S. Reddy, G. V. S. R. Srama, Eur. J. Appl. Eng. Sci. Res., 2, 9-13 (2013).</mixed-citation><mixed-citation xml:lang="en">V. R. Murthy, M. L. N. Acharyulu, B. V. Srinivas, T. S. Reddy, G. V. S. R. Srama, Eur. J. Appl. Eng. Sci. Res., 2, 9-13 (2013).</mixed-citation></citation-alternatives></ref><ref id="cit68"><label>68</label><citation-alternatives><mixed-citation xml:lang="ru">International Conference on Hormonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use, ICH Harmonised Tripartite Guideline, Validation of Analytical Procedures: Text and Methodology Q2 (R 1), Complementary Guideline on Methodology dated 06 November 1996, incorporated in november 2005, London.</mixed-citation><mixed-citation xml:lang="en">International Conference on Hormonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use, ICH Harmonised Tripartite Guideline, Validation of Analytical Procedures: Text and Methodology Q2 (R 1), Complementary Guideline on Methodology dated 06 November 1996, incorporated in november 2005, London.</mixed-citation></citation-alternatives></ref><ref id="cit69"><label>69</label><citation-alternatives><mixed-citation xml:lang="ru">Europen Pharmacopoeia Monographs, 8.0, p. 3165-3166.</mixed-citation><mixed-citation xml:lang="en">Europen Pharmacopoeia Monographs, 8.0, p. 3165-3166.</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>
