Concomitant Use of Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy and Chemometrics for Quantification of Multiple Adulterants in Roasted and Ground Coffee

<div>(a) Experimental versus predicted values of adulteration (% w/w) of coffee samples based on the optimized PLS model after outlier removal. (b) Residual versus adulteration levels (% w/w) of coffee samples based on the optimized PLS model after outlier removal.</div>

Journal of Spectroscopy

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Figure 3: Concomitant Use of Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy and Chemometrics for Quantification of Multiple Adulterants in Roasted and Ground Coffee 

Figure 3 | Concomitant Use of Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy and Chemometrics for Quantification of Multiple Adulterants in Roasted and Ground Coffee 