Vol 13, No 2 (2023)

The variety of properties of highly dispersed 3nano4 materials made them promising for use in inorganic analysis, including atomic spectrometry 3atomic absorption spectrometry, atomic emission and mass spectrometry with inductively coupled plasma4. These materials are used as solid> phase extractants and matrix modifiers, and are also the object of analysis. The article discusses ways to obtain and characterize nanoparticles; provides data on the structure and properties of magnetic nanoparticles, intended for solving analytical and biomedical problems; shows the possibility of increasing the
sensitivity and selectivity of the determination of a:number of elements using nanoparticles in atomic absorption spectrometry with electrothermal atomization and in the cold vapor technique. The new possibilities of spectrometric methods for bioanalytical applications involving nanopar ticles, including inductively coupled plasma mass spectrometry in the single particle mode, are analyzed.

Ferroalloys are one of the basic components in the technological processes of the metallurgical industry. The expansion of the nomenclature, the increase in the requirements for their quality led to the need to improve the methods of analysis. The difficulty of the analysis of ferroalloys consists in a:combination of high-precision and express determination of both alloying elements and related components and impurities. In the existing state standards for the methods of analysis of ferroalloys, only chemical and physico-chemical methods of analysis are regulated: titrimetry,
gravimetry, atomic absorption spectrometry, spectrophotometry, etc., which are not universal. The article presents an overview of the methodological base and modern methods of analysis of ferroalloys.

Standard rules for assessing natural water quality indicators provide for measurements with an error, which is often commensurate with the absolute value of the controlled quantity. As a result, there are risks of an erroneous assessment of the compliance / non-compliance of natural water with the established safety and quality requirements. A simple technique for the quantitative study of such a risk is proposed. It is shown that its
maximum level is limited to 50% when managerial decisions are made under conditions of complete uncertainty. A method for taking into account the considered risks in resolving disputable situations based on the available evidence is proposed.

The article discusses the maintenance of technical records for the handling of the sample in the laboratory. Examples of forms of laboratory registration logs, monitoring of environmental conditions during storage and conditioning, movement (transfer), return, storage and write-off (disposal) of samples are presented.

2023 marks the 120th anniversary of the discovery of chromatography by Russian scientist M. S. Tsvetov. On March 21, 1903, Mikhail Semenovich read out at a meeting of the biological department of the Warsaw Society of Naturalists a report "On a new category of adsorption phenomena and their application to biochemical analysis." This date is considered the birthday of chromatography. The article is devoted to the history of the formation and development of chromatography in Yoshkar-Ola.