# Scatter correction of transmission near-infrared spectra by photon migration data: Quantitative analysis of solids

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**Scatter correction of transmission near-infrared spectra by photon migration data: Quantitative analysis of solids.** / Abrahamsson, Christoffer; Lowgren, A; Stromdahl, B; Svensson, Tomas; Andersson-Engels, Stefan; Johansson, Jonas; Folestad, S.

Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift

### Harvard

*Applied Spectroscopy*, vol. 59, nr. 11, s. 1381-1387.

### APA

*Applied Spectroscopy*,

*59*(11), 1381-1387.

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### MLA

*Applied Spectroscopy*. 2005, 59(11). 1381-1387.

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### RIS

TY - JOUR

T1 - Scatter correction of transmission near-infrared spectra by photon migration data: Quantitative analysis of solids

AU - Abrahamsson, Christoffer

AU - Lowgren, A

AU - Stromdahl, B

AU - Svensson, Tomas

AU - Andersson-Engels, Stefan

AU - Johansson, Jonas

AU - Folestad, S

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Atomic physics (011013005), Physics, Faculty of Technology (011013200)

PY - 2005

Y1 - 2005

N2 - The scope of this work is a new methodology to correct conventional near-infrared (NIR) data for scattering effects. The technique aims at measuring the absorption coefficient of the samples rather than the total attenuation measured in conventional NIR spectroscopy. The main advantage of this is that the absorption coefficient is independent of the path length of the light inside the sample and therefore independent of the scattering effects. The method is based on time-resolved spectroscopy and modeling of light transport by diffusion theory. This provides an independent measure of the scattering properties of the samples and therefore of the path length of light. This yields a clear advantage over other preprocessing techniques, where scattering effects are estimated and corrected for by using the shape of the measured spectrum only. Partial least squares (PLS) calibration models show that, by using the proposed evaluation scheme, the predictive ability is improved by 50% as compared to a model based on conventional NIR data alone. The method also makes it possible to predict the concentration of active substance in samples with other physical properties than the samples included in the calibration model.

AB - The scope of this work is a new methodology to correct conventional near-infrared (NIR) data for scattering effects. The technique aims at measuring the absorption coefficient of the samples rather than the total attenuation measured in conventional NIR spectroscopy. The main advantage of this is that the absorption coefficient is independent of the path length of the light inside the sample and therefore independent of the scattering effects. The method is based on time-resolved spectroscopy and modeling of light transport by diffusion theory. This provides an independent measure of the scattering properties of the samples and therefore of the path length of light. This yields a clear advantage over other preprocessing techniques, where scattering effects are estimated and corrected for by using the shape of the measured spectrum only. Partial least squares (PLS) calibration models show that, by using the proposed evaluation scheme, the predictive ability is improved by 50% as compared to a model based on conventional NIR data alone. The method also makes it possible to predict the concentration of active substance in samples with other physical properties than the samples included in the calibration model.

KW - scatter correction

KW - near-infrared spectroscopy

KW - time-resolved

KW - spectroscopy

KW - diffusion

KW - photon migration

KW - NIR spectroscopy

KW - PLS

KW - partial least squares

M3 - Article

VL - 59

SP - 1381

EP - 1387

JO - Applied Spectroscopy

T2 - Applied Spectroscopy

JF - Applied Spectroscopy

SN - 1943-3530

IS - 11

ER -