Проблемы разработки новых национальных стандартов на методы анализа благородных металлов и их сплавов

A review of the currently effective Russian national standards for methods of platinum metal and alloy analysis has been made, many of the standards being obsolete as for their content and the analytical procedures used. Some problems of the development of the new national standards have been described and the way of problem solving has been suggested.Приведен обзор действующих национальных стандартов на методы анализа благородных металлов и их сплавов, многие из которых устарели не только по форме и содержанию, но и по существу используемых методик анализа. Рассмотрены проблемы и предложены пути разработки новых национальных стандартов

Prospects in Analytical Atomic Spectrometry

Tendencies in five main branches of atomic spectrometry (absorption, emission, mass, fluorescence and ionization spectrometry) are considered. The first three techniques are the most widespread and universal, with the best sensitivity attributed to atomic mass spectrometry. In the direct elemental analysis of solid samples, the leading roles are now conquered by laser-induced breakdown and laser ablation mass spectrometry, and the related techniques with transfer of the laser ablation products into inductively-coupled plasma. Advances in design of diode lasers and optical parametric oscillators promote developments in fluorescence and ionization spectrometry and also in absorption techniques where uses of optical cavities for increased effective absorption pathlength are expected to expand. Prospects for analytical instrumentation are seen in higher productivity, portability, miniaturization, incorporation of advanced software, automated sample preparation and transition to the multifunctional modular architecture. Steady progress and growth in applications of plasma- and laser-based methods are observed. An interest towards the absolute (standardless) analysis has revived, particularly in the emission spectrometry.Comment: Proofread copy with an added full reference list of 279 citations. A pdf version of the final published review may be requested from Alexander Bol'shakov <[email protected]

Process of soil destruction: experimental results

The article presents the results of experimental studies of the ripping resistance force on a tracked bulldozer-ripper manufactured by the Chelyabinsk Tractor Plant. The experiment covers three ripping depths and eight angles. It has been experimentally established that the dependence of the ripping resistance force on each of these parameters is quadratic. The authors propose the use of a complex parameter which is equal to the product of the ripping depth by the angle when studying the ripping process. The use of the complex parameter for two-factor analysis allowed them to reduce the degree of the studied dependence while preserving the required accuracy. The complex parameter reflects the relationship between the design parameters of the ripper tooth, the ripping depth, and angle

Process of soil destruction: experimental results

The article presents the results of experimental studies of the ripping resistance force on a tracked bulldozer-ripper manufactured by the Chelyabinsk Tractor Plant. The experiment covers three ripping depths and eight angles. It has been experimentally established that the dependence of the ripping resistance force on each of these parameters is quadratic. The authors propose the use of a complex parameter which is equal to the product of the ripping depth by the angle when studying the ripping process. The use of the complex parameter for two-factor analysis allowed them to reduce the degree of the studied dependence while preserving the required accuracy. The complex parameter reflects the relationship between the design parameters of the ripper tooth, the ripping depth, and angle.</jats:p

Functional method in the treatment of elderly and senile patients with fractures of the proximal femur

The share of elderly and old people in the age structure of the population is large and constantly growing. At the same time, in industrialized countries, the frequency of fractures characteristic of this age group is increasing</jats:p

Some problems of the development of new national standards for methods of platinum metals and alloys analysis.

A review of the currently effective Russian national standards for methods of platinum metal and alloy analysis has been made, many of the standards being obsolete as for their content and the analytical procedures used. Some problems of the development of the new national standards have been described and the way of problem solving has been suggested