Effect of sample preparation methods on photometric determination of the tellurium and cobalt content in the samples of copper concentrates
Methods of determination of cobalt and nickel in copper concentrates currently used in factory laboratories are very labor intensive and time consuming. The limiting stage of the analysis is preliminary chemical sample preparation. Carrying out the decomposition process of industrial samples with concentrated mineral acids in open systems does not allow to improve the metrological characteristics of the methods, for this reason improvement the methods of sample preparation is quite relevant and has a practical interest. The work was dedicated to the determination of the optimal conditions of preliminary chemical preparation of copper concentrate samples for the subsequent determination of cobalt and tellurium in the obtained solution using tellurium-spectrophotometric method. Decomposition of the samples was carried out by acid dissolving in individual mineral acids and their mixtures by heating in an open system as well as by using ultrasonification and microwave radiation in a closed system. In order to select the optimal conditions for the decomposition of the samples in a closed system the phase contact time and ultrasonic generator’s power were varied. Intensification of the processes of decomposition of copper concentrates with nitric
acid (1:1), ultrasound and microwave radiation allowed to transfer quantitatively cobalt and tellurium into solution spending 20 and 30 min respectively. This reduced the amount of reactants used and improved the accuracy of determination by running the process in strictly identical conditions.
1 Kiselev AL (2003) Proceedings of the National Academy of Sciences of Kazakhstan. Geological Series [Isvestia NAN RK. Seriageologicheskaya] 6:28-35. (In Russian)
2 Pashkov GL, Kokorina AN (2010) Trace elements – satellites lead, zinc: distribution in the technological cycle of polymetallic lead-zinc oresprocessing [Rasseyannie elementi – sputnik svinza, zinka: raspredelenie v technologicheskih ziklah pererabotki polimetallicheskih svinzovo-zinkovihrud]. Abstracts of the II International Congress «Non-Ferrous Metals – 2010», Krasnoyarsk, Russia. P.193-201. (In Russian)
3 Safarova VI, Shaydulin GF, MikheevaTN, Kudasheva FH, Nizamutdinova NR (2010) Factory Laboratory. Diagnosis materials [Zavodskay laboratoria. Diagnostika materialov] 2:10-14. (In Russian)
4 Bashilov A (2011) Analytics [Analitika] 1:6-14. (In Russian)
5 KarpovYA, Savostin AP (2003) Methods of sampling and sample preparation [Metody probootbora i probopodgotovki]. “BINOM. Knowledge Laboratory”, Moscow, Russia. (In Russian). ISBN 978-5-9963-2584-9
6 Chmilenko FA, Smityuk NM, Baklanov AN(2005) Gruntoznavstvo [Gruntosnavstvo] 6:99-107. (In Russian)
7 (2014) GOST 32221-2013. Copper concentrates. Methods of analysis [Mednie konzentraty. Metody analisa). Moscow, Russia. (In Russian) ]
8 Delgado-Povedano MM, Luque de Castro MD (2013) Trac-Trend Anal Chem 45:1-13. http://dx.doi.org/10.1016/j.trac.2012.12.011
9 Ilander A, Väisänen A (2007) Anal Chima Acta 602:195–201. http://dx.doi.org/10.1016/j.aca.2007.09.015
10 Korostelev PP (1964) Preparation of solutions for chemical-analytical works [Prigotovlenie rastvorov dlya khimico-analiticheskih rabot]. Nauka, Moscow, Russia. (In Russian)
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