PMID- 32679978
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200720
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 28
IP  - 12
DP  - 2020 Jun 8
TI  - Quantum cascade laser-based reflectance spectroscopy: a robust approach for the 
      classification of plastic type.
PG  - 17741-17756
LID - 10.1364/OE.393231 [doi]
AB  - The identification of plastic type is important for environmental applications 
      ranging from recycling to understanding the fate of plastics in marine, 
      atmospheric, and terrestrial environments. Infrared reflectance spectroscopy is a 
      powerful approach for plastics identification, requiring only optical access to a 
      sample. The use of visible and near-infrared wavelengths for plastics 
      identification are limiting as dark colored plastics absorb at these wavelengths, 
      producing no reflectance spectra. The use of mid-infrared wavelengths instead 
      enables dark plastics to be identified. Here we demonstrate the capability to 
      utilize a pulsed, widely-tunable (5.59 - 7.41 microm) mid-infrared quantum cascade 
      laser, as the source for reflectance spectroscopy, for the rapid and robust 
      identification of plastics. Through the application of linear discriminant 
      analysis to the resulting spectral data set, we demonstrate that we can correctly 
      classify five plastic types: polyethylene terephthalate (PET), high density 
      polyethylene (HDPE), low density polyethylene (LDPE), polypropylene (PP), and 
      polystyrene (PS), with a 97% accuracy rate.
FAU - Michel, Anna P M
AU  - Michel APM
FAU - Morrison, Alexandra E
AU  - Morrison AE
FAU - Colson, Beckett C
AU  - Colson BC
FAU - Pardis, William A
AU  - Pardis WA
FAU - Moya, Xavier A
AU  - Moya XA
FAU - Harb, Charles C
AU  - Harb CC
FAU - White, Helen K
AU  - White HK
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
SB  - IM
EDAT- 2020/07/19 06:00
MHDA- 2020/07/19 06:01
CRDT- 2020/07/19 06:00
PHST- 2020/07/19 06:00 [entrez]
PHST- 2020/07/19 06:00 [pubmed]
PHST- 2020/07/19 06:01 [medline]
AID - 432207 [pii]
AID - 10.1364/OE.393231 [doi]
PST - ppublish
SO  - Opt Express. 2020 Jun 8;28(12):17741-17756. doi: 10.1364/OE.393231.