What is ISO 15900- Electrical mobility analysis for aerosol particles about?
ISO 15900 provides guidelines and requirements for the determination of aerosol particle number size distribution by means of the analysis of electrical mobility of aerosol particles. This measurement is usually called “differential electrical mobility analysis for aerosol particles”. ISO 15900 is applicable to particle size measurements ranging from 1 nm to 1 μm. ISO 15900 includes the calculation method of uncertainty. In ISO 15900, the complete system for carrying out differential electrical mobility analysis is referred to as DMAS (differential mobility analyzing system), while the element within this system that classifies the particles according to their electrical mobility is referred to as DEMC (differential electrical mobility classifier).
NOTE: ISO 15900 does not include technical requirements and specifications for the application of DMAS, which are defined in application specific standards or guidelines.
Who is ISO 15900 - Electrical mobility analysis for aerosol particles for?
ISO 15900 on electrical mobility analysis for aerosol particles is relevant to:
- Aerosol scientists and engineers
- Semiconductor industries
Why should you use ISO 15900 - Electrical mobility analysis for aerosol particles?
Differential electrical mobility classification and analysis of airborne particles has been widely used to measure a variety of aerosol particles ranging from nanometre-size to micrometre-size in the gas phase. ISO 15900 is used to generate mono-disperse particles of known size for calibration of other instruments. ISO 15900 is based on simple physical principles. These techniques which are described in ISO 15900 have become important in many fields of aerosol science and technology, e.g. aerosol instrumentation, production of materials from aerosols, contamination control in the semiconductor industry, atmospheric aerosol science, characterization of engineered nanoparticles, and so on. ISO 15900 provides a methodology for adequate quality control in particle size and number concentration measurement.
Overall, ISO 15900 is helpful as it guides on the two procedures for the size calibration of the DMAS. The first procedure describes size calibration for the standard operating mode, i.e. the so-called dynamic scanning mode. The second procedure is on calibration in the static step mode. ISO 15900 also assists the user with the procedures of DEMC such as electron microscopy method which is used to determine the size of certified spheres, and aerodynamic methods that lead to an aerodynamic diameter which can be applied to particles of any shape.
What’s changed since the last update?
BS ISO 15900:2020 supersedes BS ISO 15900:2009, which is withdrawn.
BS ISO 15900:2020 replaces the first edition (ISO 15900:2009), which has been technically revised.
The main changes compared to the previous edition are as follows:
- Subclauses on particle losses due to Brownian diffusion, effects due to non-spherical particles, and measurement of particles below 10 nm have been added in Clause 5
- Traceability diagrams for DEMC and DMAS have been added in Clause 5
- Calibration for size measurement in Clause 8 has been refined
- Clause 9 for “Using a DEMC at a fixed voltage to generate particles of a chosen size” has been added
- Annex D for “Data inversion” has been rewritten completely
