Determination of Au, Pb, Ni and Co in Mineral Raw Materials by Atomic Absorption Spectroscopy with Graphite Furnace

A method for quantitative determination of gold, lead, nickel, cobalt in a range of concentrations from mg/g to ng/g was proposed. Method consists of annealing, treatment with acids followed by extraction. Determination of nickel, cobalt and lead was carried out after the decomposition of the sample, without discharge of the sample matrix. Method was tested by certified reference material and various rock samples. Method can be applied for determination of corresponding metals in ores, rocks and waste mining industry

Crystal morphology and thermal EMF of pyrites in the western flank of Sukholozhsky gold ore field (Lenski ore area)

The investigated crystal morphology and thermal EMF of pyrites in the western flank of Sukholozsky ore field showed that the pyrite crystals have cubic habitus with a weakly-developed face {210}. The crystal faces {100} and {210} are covered with multiple irregular-oriented growth laminae. It has been determined that pyrites have such a property as p-type conduction and embrace insignificant thermal EMF variations. The results of the research indicated the fact of upper ore zone erosion in the western flank of Sukholozhsky ore field and its area potential at depth

Exploration and local forecast of gold-ore deposits based on typomorphic properties of pyrite

The article describes the data in exploration and local forecast of gold-ore deposits based on typomorphic pyrite properties. The pyrite properties: crystal shape, impurity-elements and thermal EMF change in relation to the deposit formation conditions are consistent with the mineralogical and geochemical zoning of ore bodies and deposits. In this case, it is possible to evaluate the ore zone erosion, prospectivity and productivity of the ore bodies at depth and flanks. Mineralogical sampling on pyrite and gold should be conducted on the basis of other methods during exploration and mining

Determination of Platinum Metals in Carbonaceous Mineral Raw Materials by Stripping Voltammetry

The paper considers the possibility of determining platinum metals in mineral raw materials by stripping voltammetry on a graphite electrode modified by metals. Stripping voltammetry method is characterized by low determination limit, wide intervals of determined content and high sensitivity. As a result of the research the conditions for the determination of gold, platinum and palladium by stripping voltammetry have been selected. The comparison of the results of gold, palladium and platinum determination by stripping voltammetry and atomic absorption is presented

Methods of RFID data processing in intelligent systems for the identification and movement control of industrial products

Основная статьяThe article describes the development and research of methods of RFID data processing to build intelligent systems that provide timely and reliable automatic movement control and identification of industrial products. Conducted and presented an analytical review of Russian and foreign scientific-technical base for the development of methods and algorithms for movement control systems. The structure of the hardware-software complex of the system developed. The method of movement control products is presented. We presented experimental studies of the developed system and methods

EFFECT OF ANTIHYPERTENSIVE THERAPY BASED ON NEW METHOD OF INDIVIDUAL CHOICE OF DRUGS ON LEFT VENTRICULAR HYPERTROPHY IN ELDERLY PATIENTS

Aim. To study the effects of antihypertensive therapy based on consideration of individual heart rhythm variability (HRV) on left ventricular hypertrophy (LVH) in hypertensive elderly patients.Material and methods. 60 hypertensive elderly patients with LVH were included in the study. They were split in two groups (30 people in each one). Patients of the group-I had common antihypertensive therapy. Patients of group-II received medications prescribed with consideration of individual heart rate variability. Holter monitoring with analysis of HRV, 24-hour blood pressure monitoring and ultrasonography were conducted initially and 18 months after treatment beginning.Results. BP control was reached in the majority of patients of both groups. The patients of group-II in comparison with patients of group-I had reduction of low- high frequency power ratio (LF/HF) and higher rate of LVH reduction. Relationship between LVH dynamics and ratio LF/HF was found.Conclusion. Arterial hypertension therapy considering individual HRV contributes in LVH reduction in elderly patients

EFFECT OF ANTIHYPERTENSIVE THERAPY BASED ON NEW METHOD OF INDIVIDUAL CHOICE OF DRUGS ON LEFT VENTRICULAR HYPERTROPHY IN ELDERLY PATIENTS

Aim. To study the effects of antihypertensive therapy based on consideration of individual heart rhythm variability (HRV) on left ventricular hypertrophy (LVH) in hypertensive elderly patients.Material and methods. 60 hypertensive elderly patients with LVH were included in the study. They were split in two groups (30 people in each one). Patients of the group-I had common antihypertensive therapy. Patients of group-II received medications prescribed with consideration of individual heart rate variability. Holter monitoring with analysis of HRV, 24-hour blood pressure monitoring and ultrasonography were conducted initially and 18 months after treatment beginning.Results. BP control was reached in the majority of patients of both groups. The patients of group-II in comparison with patients of group-I had reduction of low- high frequency power ratio (LF/HF) and higher rate of LVH reduction. Relationship between LVH dynamics and ratio LF/HF was found.Conclusion. Arterial hypertension therapy considering individual HRV contributes in LVH reduction in elderly patients.</p

MINERALOGY OF THE ALLOWER GOLD DEPOSIT OF THE R. ZASLONKA (GORNAYA SHORIIA)

Link for citation: Pshenichkin A.Ya., Gavrilov R.Yu. Mineralogy of placer gold deposit of the r. Zaslonka (Gornaya Shoria). Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2023, vol. 334, no. 5, рр.129-137. In Rus. The relevance of the work is caused by the need to replenish the mineral resource base of gold on the basis of comprehensive information obtained recently using a modern analytical base. Purpose: to study the mineralogical composition of samples of the placer deposit of the river Zaslonka (Gornaya Shoria). Methods: mineralogical studies, crystal morphology, X-ray spectral analysis, scanning electron microscopy. Object: samples of concentrates from the alluvial gold deposit of the Zaslonka river (Gornaya Shoria). Results. The authors carried out the study of the mineralogical composition, including the morphology of gold particles, samples of black concentrates on the MBS-10 binocular microscope and OLYMPUS SZX10 stereomicroscope, and slags after gold melting during the preparation of doré alloy on a Hitachi S-3400N scanning electron microscope. Photomicrographs of various types of gold particles and other minerals were taken. As a result of the research, it was found that the vast majority of gold particles belong to very small (68,71 %), as well as to small (14,69 %) and thin (12,47 %) size classes. Gold concentrates, after enrichment on a flotation table, are weakly radioactive due, apparently, to a thin dissemination of Th-U-containing minerals, which is confirmed by the study of slags on an electron microscope after melting gold during the production of doré alloy, where uranothorite, zircon and gold are found in the form of granular spherules. There are, apparently, three sources of gold entering the placer: 1) gold in the «shirt», covered with dark gray, almost black dense films, which is older gold and probably has a more distant source of drift; 2) gold of medium degree of roundness – flattened and lumpy golden-, dull-yellow and silvery-yellow in color, the sources of formation of which were medium-temperature and medium-distant quartz veins of the area; 3) unrounded golden-yellow gold, formed from nearby quartz weakly gold-bearing veins. The poor mineralogical composition of concentrates (and the almost absence of oxidized sulfide minerals, except for pyrite) indicates the presence of low-sulfide medium-temperature quartz veins with a low content of fine gold in primary ores