International Standard
ISO 21501-1:2025
Determination of particle size distribution — Single particle light interaction methods — Part 1: Light scattering aerosol spectrometer
Reference number
ISO 21501-1:2025
Edition 2
2025-12
© ISO 2026
Read sample
Published (Edition 2, 2025)

ISO 21501-1:2025

Language
Format
CHF 181
* Shipping costs not included
Convert Swiss francs (CHF) to your currency

Abstract

This document specifies characteristics of a light scattering aerosol spectrometer (LSAS) which is used for measuring the size, number concentration and number-based size distribution of particles suspended in a gas. This document provide the calibration procedure and the validation method for aerosol spectrometers.

This document applies to:

—    characterization of metered dose inhalers (MDI), dry powder inhalers (DPI) and nebulizers in pharmacy;

—    production control of active agents;

—    cut-off determination: impactors, cyclones and impingers;

—    atmospheric aerosols: bio-aerosols, stables or composting facilities, nebulized droplets, measurements in street tunnels;

—    fractional separation efficiency determination of filters.

General information

  • Status
     : Published
    Publication date
     : 2025-12
    Stage
    : International Standard published [60.60]
  • Edition
     : 2
    Number of pages
     : 37
  • Technical Committee :
    ISO/TC 24/SC 4
    ICS :
    19.120 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

Got a question?

Check out our Help and Support

  2. Store
  3. Store
  4. ICS
  5. 19
  6. 19.120
  7. ISO 21501-1:2025