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SM ISO690:2012 MITINA, Tatiana, BONDARENKO, Nadejda, GRIGORAS, Diana, BOTIZAT, Elena, LUPASCU, Tudor. Determination of strontium ions concentration in water with a high content of sodium ions. In: The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova, 28-30 mai 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Chimie al AȘM, 2014, p. 168. |
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The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova 2014 | ||||||
Conferința "The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova" Chișinău, Moldova, 28-30 mai 2014 | ||||||
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Pag. 168-168 | ||||||
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Strontium is a microcomponent of waters. A lot is known regarding the negative effects |
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<?xml version='1.0' encoding='utf-8'?> <oai_dc:dc xmlns:dc='http://purl.org/dc/elements/1.1/' xmlns:oai_dc='http://www.openarchives.org/OAI/2.0/oai_dc/' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd'> <dc:creator>Mitina, T.F.</dc:creator> <dc:creator>Bondarenco, N.G.</dc:creator> <dc:creator>Grigoraş, D.G.</dc:creator> <dc:creator>Botizat, E.</dc:creator> <dc:creator>Lupaşcu, T.G.</dc:creator> <dc:date>2014</dc:date> <dc:description xml:lang='en'><p>Strontium is a microcomponent of waters. A lot is known regarding the negative effects<br />of elevated strontium concentrations on human health. Being close to calcium by its chemical<br />properties strontium sharply differs in its biological action. Excess levels of this element in water<br />cause the substitution by strontium of calcium in bones, liver and brain. This pathology is a<br />reflection of the competitive relations of strontium and calcium in their distribution in the body.<br />Determination of microcomponents on the background of high concentrations of major<br />components of water is always associated with the possibility to get a wrong result due to the<br />occurrence of spectral and matrix effects. We studied the effect of sodium ions on the results of<br />determination of strontium concentrations by emission flame photometry. This is due to the fact<br />that sodium is a macrocomponent of water and its content in drinking water in Moldova is<br />limited to 200 mg/l. At the same time, our experience shows that sodium concentration in the<br />waters of Moldova is highly variable and can range from small concentrations to concentrations<br />far exceeding the maximum permissible value. In the present study we evaluated the use of<br />flame emission photometry method for determining the concentration of strontium ions in water<br />in the presence of various concentrations of sodium ions and a comparison with the method of<br />atomic absorption spectrometry. The research work was carried out on model solutions and the<br />natural mineral water from Soroca<br />It was shown that the presence of high sodium content in water leads to an overestimation<br />of results in determination of strontium by flame photometry. Thus, the concentration of<br />strontium (1.0 mg/L) increases 1.33 times if sodium ion concentration is 230 mg/l, 1.66 times<br />when concentration of sodium ions is 575 mg/L and 2.33 fold at a concentration of sodium ions<br />of 1150 mg/l.<br />A linear dependence of the background radiation on the sodium concentration was<br />established for the method of emission flame photometry at a wavelength of 460.7 nm (spectral<br />emission line of strontium). The greatest impact of high concentrations of sodium on the result of<br />determining the concentration of strontium ions is at low levels of strontium.<br />It was shown that taking into consideration the background radiation of sodium ions<br />allows to obtain reliable results.<br />During this study was revealed the overwhelming influence of nitric acid to<br />determination of strontium concentration by flame photometry.<br />In the case of using the method of atomic absorption spectroscopy in the determination of<br />strontium in different types of waters there have been identified no interferences of sodium ions<br />or nitric acid.<br />Metrological characteristics of both methods were assessed.</p></dc:description> <dc:source>The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova () 168-168</dc:source> <dc:title>Determination of strontium ions concentration in water with a high content of sodium ions</dc:title> <dc:type>info:eu-repo/semantics/article</dc:type> </oai_dc:dc>