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USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
For more information on the library, see: local link web link

TITLE: Plastic_PETE GDS379 TrnslBrn DESCRIPT

DOCUMENTATION_FORMAT: Man_Made

SAMPLE_ID: GDS379

MATERIAL_TYPE: Plastic

MATERIAL: Plastic PETE, Polyethylene terephthalate

FORMULA: CH4 compound

FORMULA_HTML: CH4 compound

COLLECTION_LOCALITY: Grocery Store

ORIGINAL_DONOR: Gregg Swayze

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Translucent dark brown PETE Plastic from a pop bottle. Sample is 1 mm thick.

IMAGE_OF_SAMPLE:
Photo of sample

Sample is relatively dark so is difficult to see in this photo.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum has a broad absorption in the visible centered near 0.48 microns with a reflectance peak at 0.612 microns. There is an additional band at 0.66 microns before the absorption edge. The spectrum is flat from 0.8 microns to 1.0 microns. A series of complex absorptions dominate the spectrum from this point out to 2.5 microns. The 1.7 micron C-H stretch absorptions and 2.3 micron C-H combination bands are strong in this sample. There is also a complex of four absorptions centered near 2.15 microns.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns