Rapid identification of plastics from electronic devices with NIR-spectroscopy

In this study, a NIR-based identification system for recycling purposes of plastics from electronic devices has been constructed and tested with 91 ty pical samples, such as computer housings. The system consisted of a robust NIR-monochromator with a fast InGaAs-diode array detector, a conventional h alogen lamp as fight source and a standard PC for signal processing. Spectr a have been collected in the wavelength range between 800 and 1700 nn. Chem ometric data analysis with appropriate data preprocessing (smoothing differ entiation) led to the desired distinction of the different plastic types. I t was shown, that the presented system has, due to its speed, the potential of being applied to high throughput recycling streams.