A new method for the simultaneous measurement of aerosol particle size, complex refractive index and particle density

W. W. Szymanski, A. Nagy, A. Czitrovszky, P. Jani

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Particle size measurement by means of optical spectrometry of single particles depends substantially on the angular range of light scattering and the refractive index of the particle. Knowledge of the latter determines implicity the accuracy of measurement. In contrast to commonly used instrumental systems the configuration of the design concept presented here consists of two laser illumination sources with different wavelengths and four angular ranges for the collection of scattered light. As a result a set of four independent pulses from each measured particle can be obtained allowing simultaneous assessment of particle size and its complex refractive index. Based on the Mie theory of light scattering, light collection angles yielding a single-valued aerosol size measurement were identified and used to design a new optical system. Based on the modelling of the performance for an assumed instrumental arrangement the sizing errors were found to be about 2%. The accuracy of assessment of the complex index of refraction was found to be of the order of 10% over the range of particle diameters investigated (0.1-10 μm). The theoretical results show clearly the capability of this novel instrumental design for the measurement of aerosol particle sizes, their density and optical properties. Based on these model calculations an experimental set-up is under construction.

Original languageEnglish
Pages (from-to)303-307
Number of pages5
JournalMeasurement Science and Technology
Volume13
Issue number3
DOIs
Publication statusPublished - Mar 2002

Fingerprint

Aerosol
Aerosols
Particle Size
Refractive Index
Particles (particulate matter)
Refractive index
aerosols
Particle size
refractivity
Light Scattering
Light scattering
Range of data
Mie Theory
Single valued
Refraction
Optical systems
Optical System
Optical Properties
Spectrometry
light scattering

Keywords

  • Ligh scattering
  • Optical detection
  • Particle density
  • Particle sizing
  • Refractive index

ASJC Scopus subject areas

  • Polymers and Plastics
  • Ceramics and Composites
  • Materials Science (miscellaneous)

Cite this

A new method for the simultaneous measurement of aerosol particle size, complex refractive index and particle density. / Szymanski, W. W.; Nagy, A.; Czitrovszky, A.; Jani, P.

In: Measurement Science and Technology, Vol. 13, No. 3, 03.2002, p. 303-307.

Research output: Contribution to journalArticle

@article{e0305f62f4cb433a8658dceb7758ed29,
title = "A new method for the simultaneous measurement of aerosol particle size, complex refractive index and particle density",
abstract = "Particle size measurement by means of optical spectrometry of single particles depends substantially on the angular range of light scattering and the refractive index of the particle. Knowledge of the latter determines implicity the accuracy of measurement. In contrast to commonly used instrumental systems the configuration of the design concept presented here consists of two laser illumination sources with different wavelengths and four angular ranges for the collection of scattered light. As a result a set of four independent pulses from each measured particle can be obtained allowing simultaneous assessment of particle size and its complex refractive index. Based on the Mie theory of light scattering, light collection angles yielding a single-valued aerosol size measurement were identified and used to design a new optical system. Based on the modelling of the performance for an assumed instrumental arrangement the sizing errors were found to be about 2{\%}. The accuracy of assessment of the complex index of refraction was found to be of the order of 10{\%} over the range of particle diameters investigated (0.1-10 μm). The theoretical results show clearly the capability of this novel instrumental design for the measurement of aerosol particle sizes, their density and optical properties. Based on these model calculations an experimental set-up is under construction.",
keywords = "Ligh scattering, Optical detection, Particle density, Particle sizing, Refractive index",
author = "Szymanski, {W. W.} and A. Nagy and A. Czitrovszky and P. Jani",
year = "2002",
month = "3",
doi = "10.1088/0957-0233/13/3/311",
language = "English",
volume = "13",
pages = "303--307",
journal = "Measurement Science and Technology",
issn = "0957-0233",
publisher = "IOP Publishing Ltd.",
number = "3",

}

TY - JOUR

T1 - A new method for the simultaneous measurement of aerosol particle size, complex refractive index and particle density

AU - Szymanski, W. W.

AU - Nagy, A.

AU - Czitrovszky, A.

AU - Jani, P.

PY - 2002/3

Y1 - 2002/3

N2 - Particle size measurement by means of optical spectrometry of single particles depends substantially on the angular range of light scattering and the refractive index of the particle. Knowledge of the latter determines implicity the accuracy of measurement. In contrast to commonly used instrumental systems the configuration of the design concept presented here consists of two laser illumination sources with different wavelengths and four angular ranges for the collection of scattered light. As a result a set of four independent pulses from each measured particle can be obtained allowing simultaneous assessment of particle size and its complex refractive index. Based on the Mie theory of light scattering, light collection angles yielding a single-valued aerosol size measurement were identified and used to design a new optical system. Based on the modelling of the performance for an assumed instrumental arrangement the sizing errors were found to be about 2%. The accuracy of assessment of the complex index of refraction was found to be of the order of 10% over the range of particle diameters investigated (0.1-10 μm). The theoretical results show clearly the capability of this novel instrumental design for the measurement of aerosol particle sizes, their density and optical properties. Based on these model calculations an experimental set-up is under construction.

AB - Particle size measurement by means of optical spectrometry of single particles depends substantially on the angular range of light scattering and the refractive index of the particle. Knowledge of the latter determines implicity the accuracy of measurement. In contrast to commonly used instrumental systems the configuration of the design concept presented here consists of two laser illumination sources with different wavelengths and four angular ranges for the collection of scattered light. As a result a set of four independent pulses from each measured particle can be obtained allowing simultaneous assessment of particle size and its complex refractive index. Based on the Mie theory of light scattering, light collection angles yielding a single-valued aerosol size measurement were identified and used to design a new optical system. Based on the modelling of the performance for an assumed instrumental arrangement the sizing errors were found to be about 2%. The accuracy of assessment of the complex index of refraction was found to be of the order of 10% over the range of particle diameters investigated (0.1-10 μm). The theoretical results show clearly the capability of this novel instrumental design for the measurement of aerosol particle sizes, their density and optical properties. Based on these model calculations an experimental set-up is under construction.

KW - Ligh scattering

KW - Optical detection

KW - Particle density

KW - Particle sizing

KW - Refractive index

UR - http://www.scopus.com/inward/record.url?scp=0036501203&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036501203&partnerID=8YFLogxK

U2 - 10.1088/0957-0233/13/3/311

DO - 10.1088/0957-0233/13/3/311

M3 - Article

AN - SCOPUS:0036501203

VL - 13

SP - 303

EP - 307

JO - Measurement Science and Technology

JF - Measurement Science and Technology

SN - 0957-0233

IS - 3

ER -