Extended multiplicative signal correction

In the previous section, it was noted that the MSC method is expected to perform poorly in cases where spectral offset and multiplicative variations are very small relative to those obtained from chemistry-based variations. In response to this, several methods were developed to enable more accurate multiplicative corrections through better modeling of chemistry-based variations in the data [34-35]. One such method is an extension of the MSC method, appropriately called extended multiplicative signal correction (EMSC) [35-37]. 

H. Martens and E. Stark, Extended multiplicative signal correction and spectral interference subtraction new preprocessing methods for near infrared spectroscopy, J. Pharm. Biomed. Anal, 9, 625-35 (1991). 

H. Martens, J.P. Nielsen and S.B. Engelsen, Light scattering and light absorbance separated by extended multiplicative signal correction. Application to near-infrared transmission analysis of powder mixtures, Anal Chem., 75, 394 (2003). 

Kohler, A., Zimonja, M., Segtnan, V., and Martens, H. (2009). Standard normal variate, multiplicative signal correction and extended multiplicative signal correction preprocessing in biospectroscopy. In "Comprehensive Chemometrics", (S. D. Brown, R. Tauler, and B. Walczak, Eds), Vol. 2, pp. 139-162. Elsevier, Amsterdam. 

Martens, H. and Stark, E., Extended Multiplicative Signal Correction and Spectral Interference Subtraction New Preprocessing Methods for Near Infrared Spectroscopy /. Pharm. Biomed. 

This resonant Mie scattering effect is the cause of the phenomenon previously referred to as the dispersion artefact , which was an inaccurate description because the effect was not solely due to dispersion and it is not an artefact because it can be explained fully. With an understanding of the physics behind resonant Mie scattering, preliminary algorithms based on the extended multiplicative signal correction (EMSC) have been developed. The EMSC... 

Resonant Mie Scattering Correction using the Extended Multiplicative Signal Correction (RMieS-EMSC)... 

Afseth NK, Kohler A. Extended multiplicative signal correction in vibrational spectroscopy, a tutorial. Chemometr Intell Lab 2012 117 92-9. 

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