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328 4 |
Ultima descărcare din IBN: 2024-04-16 14:04 |
Căutarea după subiecte similare conform CZU |
001.891:54(478)(092) (1) |
Metodologia generală. Metode științifice și tehnice de cercetare. Analiza și sinteza științifică (1144) |
Chimie. Cristalografie. Mineralogie (2025) |
SM ISO690:2012 POVAR, Igor, PINTILIE, Boris, SPÎNU, Oxana. Dozarea cronovoltametrică indirectă a metalelor alcalino-pământoase. Contribuția savantului chimist Ion Vatamanu la dezvoltarea metodelor electrochimice de analiză. In: Revista de Ştiinţă, Inovare, Cultură şi Artă „Akademos”, 2022, nr. 1(64), pp. 70-80. ISSN 1857-0461. DOI: https://doi.org/10.52673/18570461.22.1-64.10 |
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Revista de Ştiinţă, Inovare, Cultură şi Artă „Akademos” | |||||||
Numărul 1(64) / 2022 / ISSN 1857-0461 /ISSNe 2587-3687 | |||||||
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DOI:https://doi.org/10.52673/18570461.22.1-64.10 | |||||||
CZU: 001.891:54(478)(092) | |||||||
Pag. 70-80 | |||||||
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The paper presents the results of a series of investigations on the indirect chronovoltametric dosing of alkaline earth metals, carried out in the Laboratory of the Analytical Chemistry at the Institute of Chemistry, currently called the Laboratory of Physicochemical Methods of Research and Analysis, conducted in 1971–1993 by the doctor of chemical sciences Ion Vatamanu. During the elaboration of the presented polarographic methods for determining the ions of alkaline-earth metals, a series of techniques were used to increase the sensitivity and selectivity of the determination. Based on two indirect polarographic methods for measuring alkaline earth metals, developed by Ion Vatamanu and coworkers and analyzed in this paper, two fundamental physicochemical principles were applied: (I) anion-induced adsorption of ligands adsorbed on the electrode surface and (II) thermodynamic determination of the optimal dosing conditions by calculating the conditional constants or the equilibrium chemical composition of complex reactant systems. The developed methods were used in the electrochemical analysis of standard alloy samples based on various metals, in the analysis of semiconductor systems, ferrous metals, nickel electrolytes, copper plating, cadmium plating, chromium plating, aluminum oxidation, wastewater analysis in galvanic baths, clays and limestones from Moldovan deposits, determination of pesticides, tanning extracts, dyes for the textile industry, etc. |
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Cuvinte-cheie alkaline earth metals, anion-induced adsorption, indirect chronovoltametry, polarography, thermodynamics of complex chemical equilibria, adsorbție anion-indusă, cronovoltametrie indirectă, metale alcalino-pământoase, polarografie, termodinamica echilibrelor chimice complexe |
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