Figure 2. Plastic separation in miniature using NIR diffuse reflectance spectroscopy showing the main components (bottom) and a schematic thereof (top)

From

Low-cost Spectroscopy: Experiments in Various Spectral Ranges

Patrick Gräb, Ekkehard Geidel, Hans-Christian Schmitt

World Journal of Chemical Education. 2021, 9(4), 144-151 doi:10.12691/wjce-9-4-7