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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_HDPE GDS373 Grey Bag DESCRIPT

DOCUMENTATION_FORMAT: Man_Made

SAMPLE_ID: GDS373

MATERIAL_TYPE: Plastic

MATERIAL: Gray HDPE Plastic

FORMULA: CH4 compound

FORMULA_HTML: CH4 compound

COLLECTION_LOCALITY: Littleton, Colorado

ORIGINAL_DONOR: Gregg Swayze

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab

SAMPLE_DESCRIPTION:

Sample is of a light gray HDPE plastic grocery bag with a thickness of 0.1 mm.

IMAGE_OF_SAMPLE:
Photo of sample

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:

The gray HDPE plastic bag spectrum has a relatively shallow concave shape with an average reflectance of about 41%. Weak absorptions occur at 1.3933 and 1.4186 microns. There are C-H stretch absorptions at 1.7302, 1.7653, and 1.8227 microns. There are also C-H combination bands at 2.3109, 2.3505 microns and and a broad complex of bands centered around 2.415 microns.

END_SPECTROSCOPIC_DISCUSSION.

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