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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 4 — Feb. 1, 1997
  • pp: 885–891

Commercial spectrophotometer for particle sizing

Fabio Ferri, Alessandra Bassini, and Enrico Paganini  »View Author Affiliations


Applied Optics, Vol. 36, Issue 4, pp. 885-891 (1997)
http://dx.doi.org/10.1364/AO.36.000885


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Abstract

Particle-size distribution and the concentration of polystyrene particles suspended in water were accurately recovered from the inversion of spectral extinction data measured with a commercial spectrophotometer. The instrument was modified by placing a spatial filter in the collection optics to prevent low-angle scattered light from affecting the measurement of transmitted power. The data were inverted by use of a nonlinear iterative algorithm. When the extinction coefficient is measured in the λ range of 0.3–1.1 µm, the particle distributions can be retrieved over a diameter range of 0.6–2.8 µm for a wide interval of sample concentrations. The average diameters are recovered with a precision of better than ±1% and with accuracies consistent with the uncertainties by which the nominal diameters are known. The relative standard deviations of distributions corresponding to monodisperse samples are ±5–10%, whereas the accuracy on the measured concentrations is ∼5%.

© 1997 Optical Society of America

History
Original Manuscript: January 2, 1996
Revised Manuscript: June 12, 1996
Published: February 1, 1997

Citation
Fabio Ferri, Alessandra Bassini, and Enrico Paganini, "Commercial spectrophotometer for particle sizing," Appl. Opt. 36, 885-891 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-4-885


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References

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