Journal of Spectroscopy / 2016 / Article / Tab 1 / Research Article
Concomitant Use of Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy and Chemometrics for Quantification of Multiple Adulterants in Roasted and Ground Coffee Table 1 Mass composition of adulterated coffee samples.
Samples Adulteration level (%) Mass fraction (%) Coffee Spent coffee grounds Coffee husks Barley Corn 1 66 33.3 33.3 33.3 2 50 50 50 3 50 50 50 4 40 60 10 10 10 10 5 40 60 20 20 6 40 60 20 20 7 20 80 5 5 5 5 8 20 80 10 10 9 20 80 10 10 10 10 90 5 5 11 10 90 5 5 12 10 90 3.33 3.33 3.33 13 10 90 10 14 10 90 10 15 10 90 10 16 10 90 10 17 1 99 1 18 1 99 1 19 1 99 1 20 1 99 1 21 2 98 1 1 22 2 98 1 1 23 2 98 1 1 24 2 98 1 1 25 4 96 1 1 1 1 26 4 96 2 2 27 4 96 2 2 28 8 92 2 2 2 2 29 8 92 4 4 30 8 92 4 4 31 0.5 99.5 0.5 32 0.5 99.5 0.5 33 0.5 99.5 0.5 34 0.5 99.5 0.5