Extended multiplicative scatter correction

Thus, variations of the classical MSC method, such as extended multiplicative scatter correction (EMSC), have appeared to handle nonlinear baselines that may be better expressed by polynomial functions [16]. Recently, modifications of the EMSC algorithm, especially adapted to handle the Mie scattering effects caused by biological images, have also been implemented [17]. 

Going back to the general formulation of model-based preprocessing, the model can be extended (the method in this case is called extended multiplicative scatter correction (EMSC) [74]) to include other physical variations, for example, non-linear terms (not only proportional/multiplicative) with respect... 

EMSC extended multiplicative scatter correction—Spectral pre-... 

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). 

Martin et al. [102] reported a study in which LIBS was applied for the first time to wood-based materials where preservatives containing metals had to be determined. They applied PLS-1 block and PLS-2 block (because of the interdependence of the analytes) to multiplicative scattered-corrected data (a data pretreatment option of most use when diffuse radiation is employed to obtain spectra). They authors studied the loadings of a PCA decomposition to identify the main chemical features that grouped samples. Unfortunately, they did not extend the study to the PLS factors. However, they analysed the regression coefficients to determine the most important variables for some predictive models. 

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)... 

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