ИСТИНА

THE USE OF MULTICHANNEL ATOMIC-EMISSION SPECTRA (MAES) ANALYSER AT THE EDUCATIONAL AND SCIENTIFIC WORK IN THE GEOLOGICAL FACULTY OF LOMONOSOV MOSCOW STATE UNIVERSITY Grishantseva E.S.1, Safronova N.S.1, Popov V.I.2 1Lomonosov Moscow State University, Dept. of Geology, Geochemistry Div., e-mail: shes99@mail.ru 2 «VMK-Optoelektronika», Novosibirsk, Russia, e-mail: popov@vmk.ru One of the most widely used methods of direct multi-element analysis of solid samples (rocks, soils, sediments) in geochemical prospectings, for analytical control of the composition of the environmental objects is atomic-emission spectral analysis with the arc discharge (AD-AES). The method used in industrial and scientific laboratories of Russia, therefore there is a need for training of specialists, geochemists and ecologists, familiar with the modern methods of analytical researches. In 2013 the scientific-production association «VMK-Optoelectronika» modernized spectroanalitycal equipment in the Geochemistry Division of Geological Department Lomonosov Moscow State University. The Ltd «VMK-Optoelectronika» is the leader in the development and production of multi-channel optical spectra analyzers, and equiped to more than 500 laboratories in Russia and other countries. Special issues of journals «Analytics and Control. Scientific and applied journal on analytics, ecology, metrology and certification» v.9, №2, 2005 and «Industrial laboratory. Materials diagnostics» v.73, 2007 were comprehensively discussed the MAES analyzers and their usage for geochemical samples analysis. Modernized spectro-analytical equipment include the following: -«DFS-13-2» diffraction spectrograph with grating 1200grooves mm-1. -Multi-purpose generator «Fireball» for current arc power supply, for a spectrum excitation and the atomic-emission analysis. «Potok» - the system of semi-automatic feeding of powder samples into the arc discharge. -Multichannel atomic-emission spectra (MAES) analyzer based on 5 photodiode arrays assemblage with size 12,5x1000 mkm. -Modern computer software «Atom» for MAES analyzer. Training on spectro-analytical complex MAES included in the program of required courses of third year bachelor’s education in geology 511000 specialization «Geochemistry» and «Environmental Geology». Teaching students to work on MAES allows learning the basics of atomic-emission analysis at the modern level, to improve the visibility and effectiveness of student learning. The transition to the photoelectric analytic signal registration can significantly reduce the duration of the measurement, processing, and obtain the final result. Multifunctional software «Atom 3.2» allows to construct calibration graphs, calculate the metrological characteristics of the results, store the data, to handle and adjust data, received by students, multiple times without re-spending of samples and standards. Students learn to perform qualitative and quantitative determination of elements in a different geochemical samples, choose standards and the analytical line. Visualization of the spectra gives the possibility of comparing the spectra of standard samples and test samples, which is important at the initial stage of teaching students. In addition, the analyzer MAES was used to obtain analytical data for scientific research and implementation of graduate qualification works of students. In scientific research complex MAES were used to assess the composition of such natural objects as bottom sediments, and aquatic vegetation (macrophytes) in the ecological-geochemical studies of ecosystem Ivankovskoye reservoir. The laboratory facilities and equipment modernization in the Department of Geology, Geochemistry Division using complex MAES allows us to expand the number of defined elements due to the possibility of determination of rare earth elements, to improve the productivity of the analyses, to reduce the detection limits of the elements, to improve the reproducibility of measurements. The opportunity to work on modern equipment enhances the professional competence and skill level of graduates.