BS ISO 15900:2020
$215.11
Determination of particle size distribution. Differential electrical mobility analysis for aerosol particles
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 100 |
This document 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”. This analytical method is applicable to particle size measurements ranging from approximately 1 nm to 1 µm. This document does not address the specific instrument design or the specific requirements of particle size distribution measurements for different applications but includes the calculation method of uncertainty. In this document, the complete system for carrying out differential electrical mobility analysis is referred to as DMAS (differential mobility analysing 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).
This document does not include technical requirements and specifications for the application of DMAS, which are defined in application specific standards or guidelines, e.g. for road vehicle applications (ISO/TC 22), environmental measurements (ISO/TC 146) or nanotechnologies (ISO/TC 229).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | Foreword |
| 8 | Introduction |
| 9 | 1 Scope 2 Normative references 3 Terms and definitions |
| 12 | 4 Symbols |
| 13 | 5 General principle 5.1 Particle size classification with the DEMC |
| 14 | 5.2 Relationship between electrical mobility and particle size |
| 15 | 5.3 Measurement and data inversion |
| 16 | 5.4 Transfer function of the DEMC |
| 17 | 5.5 Charge distribution function 5.5.1 General 5.5.2 Charge distribution function for radioactive bipolar charge conditioners |
| 18 | 5.5.3 Charge distribution functions for other bipolar and unipolar charge conditioners |
| 19 | 5.6 Particle losses in the DMAS 5.7 Effects due to non-spherical particles 5.8 Measurement of particle sizes below 10 nm 5.9 Traceability of measurement results |
| 21 | 6 System and apparatus 6.1 General configuration |
| 22 | 6.2 Components 6.2.1 Pre-conditioner 6.2.2 Charge conditioner |
| 23 | 6.2.3 DEMC 6.2.4 Aerosol particle detector 6.2.5 System controller, data acquisition and analysis |
| 24 | 7 Measurement procedures 7.1 Setup and preparation of the instrument 7.1.1 General 7.1.2 Aerosol pre-conditioning: Adapting the aerosol to be measured to the requirements of the DMAS 7.1.3 Aerosol pre-conditioning: Separation of large particles |
| 25 | 7.1.4 Charge conditioning 7.1.5 DEMC: Flows |
| 26 | 7.1.6 DEMC: Voltage 7.1.7 DEMC: Temperature and pressure 7.1.8 Particle detection: CPC 7.1.9 Particle detection: FCAE 7.1.10 Data acquisition 7.2 Pre-measurement checks 7.2.1 General |
| 27 | 7.2.2 Overall DMAS check 7.2.3 Data acquisition check 7.3 Measurement 7.4 Maintenance |
| 28 | 8 Periodic tests and calibrations 8.1 Overview |
| 29 | 8.2 Zero tests 8.2.1 General 8.2.2 Particle detector zero test 8.2.3 Overall DMAS zero test with inlet filter 8.2.4 Overall DMAS zero test with DEMC voltage set to 0 V 8.3 Flow rate tests |
| 30 | 8.4 Voltage calibration 8.5 Charge conditioner test 8.6 Calibration for size measurement 8.6.1 General 8.6.2 Purpose of calibration 8.6.3 Particle size standards |
| 31 | 8.6.4 Dynamic DMAS particle size calibration procedure |
| 32 | 8.6.5 Static DMAS particle size calibration procedure |
| 36 | 8.7 Size resolution test 8.8 Number concentration calibration 9 Using a DEMC at a fixed voltage to generate particles of a chosen size 9.1 General |
| 38 | 9.2 Multiply-charged particles 9.3 Size calibration with certified spheres 9.4 Sheath flow 9.5 Slip correction (if applicable) 9.6 Voltage (if applicable) |
| 39 | 9.7 Calculation of overall uncertainty 10 Reporting of results |
| 40 | Annex A (informative) Charge conditioners and charge distributions |
| 51 | Annex B (informative) Particle detectors |
| 55 | Annex C (informative) Slip correction factor |
| 58 | Annex D (informative) Data inversion |
| 74 | Annex E (informative) Cylindrical DEMC |
| 79 | Annex F (informative) Example certificate for a DMAS particle size calibration |
| 82 | Annex G (informative) Good practice for measurements at particle sizes below 10 nm |
| 84 | Annex H (informative) Examples for overall system tests |
| 90 | Annex I (informative) Comparison of different approaches to calculate diffusion loss in laminar tube flow |
| 94 | Annex J (informative) Corrections for effects due to non-spherical particles |
| 95 | Bibliography |
