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<p>Measurements of the granulometric composition of aerosols, suspensions, and powdery materials in the ultrahigh-concentration regions are required in the chemical, oil and gas industries, where concentrated suspensions of solid particles are used. The existing tools for measuring particle number concentration in liquids are characterized by an upper limit of the particle number concentration reproduction range of 10<sup>12</sup> m<sup>−3</sup>. However, to provide metrological assurance of photometric high-precision tools used to measure particle number concentration in liquids, this range should be expanded to 10<sup>8</sup>–10<sup>18</sup> m<sup>−3</sup>. As part of the development of MSK-V particle number concentration measures in liquids, a&#xa0;technology for producing highly concentrated suspensions of monodisperse polystyrene latex spheres has been proposed. High concentration of the suspension was achieved by increasing the amount of styrene in the seeded emulsion and, consequently, increasing the number of polymer-monomeric particles during synthesis. An algorithm for performing indirect measurements of particle number concentration in aqueous suspensions of monodisperse polystyrene latex spheres is described. During the study, equipment from the State primary standard of units of disperse parameters of aerosols, suspensions, and powdery materials (GET 163-2020) was used. The particle number concentrations and metrological characteristics of the created measures were determined. The confidence intervals of the error of indirect measurement of particle number concentration in water were calculated. The limits of the relative error of indirect measurements of particle number concentration in water were found to be ± 4%. The developed measures of particle number concentration in liquids (MSK-V) will partially cover the need of the domestic market for measures and reference standards for determining the particle size and number concentration while ensuring the uniformity of measurements of the granulometric composition of aerosols, suspensions, and powdery materials.</p>

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Measures of particle number concentration in liquids for providing metrological traceability in the ultrahigh-concentration regions

  • 期刊论文

  • 发表日期：

    2025年5月1日

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  • D. V. Averkin,
  • V. I. Dobrovolskiy,
  • D. M. Balakhanov,
  • M. A. Averkina,
  • M. V. Balakhanov

摘要

Measurements of the granulometric composition of aerosols, suspensions, and powdery materials in the ultrahigh-concentration regions are required in the chemical, oil and gas industries, where concentrated suspensions of solid particles are used. The existing tools for measuring particle number concentration in liquids are characterized by an upper limit of the particle number concentration reproduction range of 1012 m−3. However, to provide metrological assurance of photometric high-precision tools used to measure particle number concentration in liquids, this range should be expanded to 108–1018 m−3. As part of the development of MSK-V particle number concentration measures in liquids, a technology for producing highly concentrated suspensions of monodisperse polystyrene latex spheres has been proposed. High concentration of the suspension was achieved by increasing the amount of styrene in the seeded emulsion and, consequently, increasing the number of polymer-monomeric particles during synthesis. An algorithm for performing indirect measurements of particle number concentration in aqueous suspensions of monodisperse polystyrene latex spheres is described. During the study, equipment from the State primary standard of units of disperse parameters of aerosols, suspensions, and powdery materials (GET 163-2020) was used. The particle number concentrations and metrological characteristics of the created measures were determined. The confidence intervals of the error of indirect measurement of particle number concentration in water were calculated. The limits of the relative error of indirect measurements of particle number concentration in water were found to be ± 4%. The developed measures of particle number concentration in liquids (MSK-V) will partially cover the need of the domestic market for measures and reference standards for determining the particle size and number concentration while ensuring the uniformity of measurements of the granulometric composition of aerosols, suspensions, and powdery materials.