ISO/TR 23015:2020

Overview

ISO/TR 23015:2020 - Fine bubble technology - Measurement technique matrix for the characterization of fine bubbles is a Technical Report that compiles and compares commonly used preparation and characterization techniques for fine bubbles. The document summarizes what each method measures (size, size distribution, concentration, zeta/charge, measurement time), lists reference standards where available, and outlines the merits and limitations of each technique to support consistent interpretation of results.

Key topics

• Measurement technique matrix covering methods such as:
  • Dynamic light scattering (DLS)
  • Zeta-potential / electrophoretic mobility
  • Particle tracking analysis (PTA)
  • Laser diffraction
  • Resonant mass measurement
  • Electrical sensing zone (Coulter-type)
  • Ultrasonic attenuation spectroscopy
  • Single-particle light interaction methods
  • Static and dynamic image analysis
  • Static multiple light scattering (SMLS)
• Characterization parameters documented for each method:
  • Size and size distribution
  • Concentration (number/volume)
  • Charge / zeta potential
  • Measurement time and practical throughput
  • Reference standards and traceability notes
• Comparative guidance on reconciling different size and concentration indices reported by different instruments and techniques.
• Definitions, abbreviations and bibliographic references curated by ISO/TC 281 (Fine bubble technology).

Practical applications

ISO/TR 23015:2020 is intended to guide selection and interpretation of measurement methods for fine bubbles in research, development and operational contexts. Typical practical uses include:

• Selecting appropriate instrumentation for bubble sizing and concentration analysis
• Designing test protocols and sample preparation workflows
• Comparing data from different labs or instruments and understanding method-driven discrepancies
• Informing quality control, method validation and R&D in technologies that depend on fine bubbles

Who should use this document

• Laboratory scientists and researchers working on fine bubble generation and behavior
• Instrument manufacturers and calibration laboratories
• Process and environmental engineers in water/wastewater treatment, flotation, aquaculture, chemical processing and related fields
• Standards developers and testing laboratories seeking harmonized interpretation of measurements

Related standards

• This Technical Report complements ISO work on measurement and characterization methods. Users should consult specific reference standards cited within the TR (instrument-specific or particle-measurement standards) for normative test procedures and calibration requirements.

Keywords: ISO/TR 23015:2020, fine bubble technology, measurement technique matrix, bubble size distribution, bubble concentration, dynamic light scattering, particle tracking analysis, zeta potential.