Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles

Scattering is a useful tool for the determination of particle size in solution. In particular, spectroscopic analysis of backscattering renders the possibility of a simplified experimental setup and direct data processing using Mie theory. We show that a simple technique based on near-infrared (NIR)...

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Autores principales: Scaffardi, Lucía Beatriz, Videla, Fabián Alfredo, Schinca, Daniel Carlos
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ingeniería
particle size determination
spectroscopic analysis of backscattering
wavelength interval
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/79195
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-79195
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería
particle size determination
spectroscopic analysis of backscattering
wavelength interval
spellingShingle Ingeniería
particle size determination
spectroscopic analysis of backscattering
wavelength interval
Scaffardi, Lucía Beatriz
Videla, Fabián Alfredo
Schinca, Daniel Carlos
Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
topic_facet Ingeniería
particle size determination
spectroscopic analysis of backscattering
wavelength interval
description Scattering is a useful tool for the determination of particle size in solution. In particular, spectroscopic analysis of backscattering renders the possibility of a simplified experimental setup and direct data processing using Mie theory. We show that a simple technique based on near-infrared (NIR) backscattering spectroscopy together with the development of the corresponding algorithm based on Fourier transform (FT) and Mie theory are a powerful tool for sizing microparticles in the range from 8 to 60 microm diameter. There are three wavelength intervals in the NIR, within which different diameter ranges were analyzed. In each one, the FT yields a coarse diameter value with an uncertainty dependent on the wavelength range. A more accurate value is obtained by further applying cross correlation between experimental and theoretical spectra. This latter step reduces the uncertainty in diameter determination between 30% and 40%, depending on wavelength interval and particle diameter. These results extend previous information on visible backscattering spectroscopy applied to sizing microparticles in the range between 1 and 24 mum diameter. This technique could be the basis for the construction of a portable and practical instrument.
format Articulo
Articulo
author Scaffardi, Lucía Beatriz
Videla, Fabián Alfredo
Schinca, Daniel Carlos
author_facet Scaffardi, Lucía Beatriz
Videla, Fabián Alfredo
Schinca, Daniel Carlos
author_sort Scaffardi, Lucía Beatriz
title Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
title_short Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
title_full Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
title_fullStr Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
title_full_unstemmed Visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
title_sort visible and near-infrared backscattering spectroscopy for sizing spherical microparticles
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/79195
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AT videlafabianalfredo visibleandnearinfraredbackscatteringspectroscopyforsizingsphericalmicroparticles
AT schincadanielcarlos visibleandnearinfraredbackscatteringspectroscopyforsizingsphericalmicroparticles
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