NIR Spectroscopy Identify the Plastics Recycling
author: Susan
2021-09-23
NIR absorption is very suitable for the analysis of transparent or light-colored polymers, and it is quite fast and reliable. For some common waste plastics (such as PE, PP, PVC, PS, ABS, PET, PC, PA, PU, etc.) The NIR spectra are all different and easy to identify, as shown in the figure.
In the NIR spectral range (wavenumber is 14300-4000cm-1, wavelength is 750-2500nm), for samples with large volume and long optical path (such as plastic bottles), the spectrum can also be accurately recorded, which is useful for identifying waste plastics. Important practical significance. The C-H, O-H, N-H and C-O bands in the NIR spectrum can be used to identify most commonly used plastics. For example, the NIR spectrum of HDPE shows a characteristic peak near 1200 nm, but PET does not have this characteristic peak, and the absorption peak of PVC here is also very small. But PET in the range of 2100-2200nm shows three characteristic peaks.
Application of NIR Spectroscopy in Tobacco
Spectrometer Comparison Guide
Related Article
The ATP7810 is a wide-band, high-resolution infrared grating spectrometer covering up to 0.9–5 μm. Featuring a motorized rotating grating, multiple detector options (InGaAs/MCT), and flexible interfaces (SMA905 or free space, USB/UART control), it delivers high SNR and stability for absorption/reflection/transmission spectroscopy, laser wavelength testing, and fiber optic sensing.
New Product Recommendation | ATP7810 Ultra-Wide Range Infrared Spectrometer Series
This study uses the ATP5200P UV-Vis spectrometer to investigate xanthate adsorption on chalcopyrite surfaces. By analyzing absorbance at 300 nm under controlled pH and temperature, the method optimizes flotation conditions for copper recovery, enabling real-time, sensitive detection of adsorption mechanisms in non-ferrous mineral processing.
Using the ATP5200P Spectrometer to Unravel Xanthate Adsorption and Separation Mechanisms
ATP1030 is an ultra‑compact, high‑resolution spectrometer covering 190–1100 nm. With a 1024‑pixel CMOS detector, adjustable integration time down to 1 ms, and USB‑powered design, it delivers reliable performance for applications like online water analysis, color measurement, handheld instruments, and Raman spectroscopy.
Product Recommendation | ATP1030 mini spectrometer Spectrometer
Vis-NIR transmission spectroscopy enables non-destructive identification of infertile duck eggs before incubation, achieving >95% accuracy. By detecting spectral fingerprints (e.g., 836 nm peak for fertile eggs), this method reduces energy waste and improves hatch rates, offering a low-cost, high-throughput solution for modern poultry farming.
Application case | How Spectral Technology is Transforming Duck Egg Farming