<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aleksandr Vladimirovich Nikulin</style></author><author><style face="normal" font="default" size="100%">Olga Georgievna Potanina</style></author><author><style face="normal" font="default" size="100%">Evgeniy Alexandrovich Platonov</style></author><author><style face="normal" font="default" size="100%">Dmitry Olegovich Bokov</style></author><author><style face="normal" font="default" size="100%">Olga Aleksandrovna Smyslova</style></author><author><style face="normal" font="default" size="100%">Rimma Aleksandrovna Abramovich</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Development and Validation of a Spectrophotometric Procedure for Determining Silicon in Common Horsetail (Equisetum arvense L.) Herb</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Equisetum arvense</style></keyword><keyword><style  face="normal" font="default" size="100%">Horsetail herb</style></keyword><keyword><style  face="normal" font="default" size="100%">Medicinal plant raw material</style></keyword><keyword><style  face="normal" font="default" size="100%">Silicon</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">September 2019</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">1124-1131</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Background: &lt;/strong&gt;An accurate, simple and selective UV-spectrophotometric method was developed for the estimation of silicon in medicinal plant raw material – horsetail herb (&lt;em&gt;Equisetum arvense&lt;/em&gt; L.) of Russian origin.&lt;strong&gt; Methods:&lt;/strong&gt; The determination of total silicon content in terms of silicon dioxide (SiO&lt;sub&gt;2&lt;/sub&gt;) by the direct ultraviolet–visible (UV-Vis) spectrophotometry method (at a wavelength of 815 ± 5 nm) in the horsetail herb is based on the formation of yellow-colored silicomolybdic acid, and its further reduction to molybdenum blue. &lt;strong&gt;Results:&lt;/strong&gt; Recoveries were found to be in the range of 100.2 to 105.1% and %RSD was less than 2%. &lt;strong&gt;Conclusion:&lt;/strong&gt; The developed method is accurate, specific, precise within an interval 2-12% and suitable for the analysis of horsetail herb commercial samples.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><section><style face="normal" font="default" size="100%">1124</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p&gt;&lt;strong&gt;Aleksandr Vladimirovich Nikulin&lt;sup&gt;1&lt;/sup&gt;, Olga Georgievna Potanina&lt;sup&gt;1&lt;/sup&gt;, Evgeniy Alexandrovich Platonov&lt;sup&gt;1&lt;/sup&gt;, Dmitry Olegovich Bokov&lt;sup&gt;2,3,&lt;/sup&gt;*, Olga Aleksandrovna Smyslova&lt;sup&gt;2&lt;/sup&gt;, Rimma Aleksandrovna Abramovich&lt;sup&gt;1 &lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;

&lt;p&gt;&lt;sup&gt;1&lt;/sup&gt;Рeoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, RUSSIA.&lt;/p&gt;

&lt;p&gt;&lt;sup&gt;2&lt;/sup&gt;Institute of Pharmacy, Sechenov First Moscow State Medical University, 8 Trubetskaya St., bldg. 2, Moscow, 119991, RUSSIA.&lt;/p&gt;

&lt;p&gt;&lt;sup&gt;3&lt;/sup&gt;Laboratory of Food Chemistry, Federal Research Center for Nutrition, Biotechnology and Food Safety, 2/14 Ustyinsky pr., Moscow, 109240, RUSSIA.&lt;/p&gt;
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