Nanoscale Materials in Analytical Atomic Spectrometry https://doi.org/10.22184/2227-572X.2023.13.2.94.104
The variety of properties of highly dispersed (nano) materials made them promising for use in inorganic analysis, including atomic spectrometry (atomic absorption spectrometry, atomic emission and mass spectrometry with inductively coupled plasma). 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 nanoparticles, including inductively coupled plasma mass spectrometry in the single particle mode, are analyzed.
Methods for Obtaining and Studying the Properties of Polymer Films Based on Polyvinyl Alcohol Gels Converted by 1-(2-Pyridylazo)-2-Naphthol https://doi.org/10.22184/2227-572X.2023.13.2.106.113
The paper presents the results of our own research on the production of polymer films based on polyvinyl alcohol hydrogels modified with 1-(2 pyridylase)-2 naphthol. This study is aimed at finding an effective way to synthesize moisture-resistant polymer films with stable optical properties. The moisture resistance of the obtained materials was evaluated by determining their deformation time in an aqueous medium and absorption spectra in the wavelength range of 190–800 nm. It is established that any of the selected synthesis methods leads to an increase in the moisture resistance of the films, but at the same time there may be a significant change in the spectral characteristics of the obtained materials. The prospects of using materials obtained by exposure to high temperatures (100 °C) for 30 minutes are indicated.
The Current State of Analytical Control of Ferroalloys https://doi.org/10.22184/2227-572X.2023.13.2.114.124
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.
The Risk of Assessing the Compliance of Water Quality With Established Requirements https://doi.org/10.22184/2227-572X.2023.13.2.126.130
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.
Determination of Total Sulfur in Natural Gas by Ultraviolet Fluorescence
Model Range ECOSTAB – New Solutions for the Analysis of Aquatic Environments from the Company LLC Ecoinstrument
Center of Russian Chromatographic Instrumentation. To the 120th Anniversary of the Discovery of Chromatography
Records On Sample Handling In The Laboratory https://doi.org/10.22184/2227-572X.2023.13.2.132.138
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.