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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Plastic GDS373 Grey HDPE 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.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), 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
| LIB_SPECTRA_HED: | where | Wave Range | Av_Rs_Pwr | Comment |
|---|---|---|---|---|
| LIB_SPECTRA: | splib05a r 10518 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 28562 | g.s.= |