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Extraction of Chemical Information of Suspensions Using Radiative Transfer Theory To Remove Multiple Scattering Effects: Application to a Model Multicomponent System

Lookup NU author(s): Raimundas Steponavicius, Dr Suresh Thennadil

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Abstract

The effectiveness of a scatter correction approach based on decoupling absorption and scattering effects through the use of the radiative transfer theory to invert a suitable set of measurements is studied by considering a model multicomponent suspension. The method was used in conjunction with partial least-squares regression to build calibration models for estimating the concentration of two types of analytes: an absorbing (nonscattering) species and a particulate (absorbing and scattering) species. The performances of the models built by this approach were compared with those obtained by applying empirical scatter correction approaches to diffuse reflectance, diffuse transmittance, and collimated transmittance measurements. It was found that the method provided appreciable improvement in model performance for the prediction of both types of analytes. The study indicates that, as long as the bulk absorption spectra are accurately extracted, no further empirical preprocessing to remove light scattering effects is required.

Publication metadata

Author(s): Steponavicius R; Thennadil SN

Publication type: Article

Publication status: Published

Journal: Analytical Chemistry

Year: 2011

Volume: 83

Issue: 6

Pages: 1931-1937

Print publication date: 22/02/2011

ISSN (print): 0003-2700

ISSN (electronic): 1520-6882

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/ac1024073

DOI: 10.1021/ac1024073

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