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Validation of ATR FT-IR to identify polymers of plastic marine debris, including those ingested by marine organisms

February 1, 2018

Polymer identification of plastic marine debris can help identify its sources, degradation, and fate. We optimized and validated a fast, simple, and accessible technique, attenuated total reflectance Fourier transform infrared spectroscopy (ATR FT-IR), to identify polymers contained in plastic ingested by sea turtles. Spectra of consumer good items with known resin identification codes #1–6 and several #7 plastics were compared to standard and raw manufactured polymers. High temperature size exclusion chromatography measurements confirmed ATR FT-IR could differentiate these polymers. High-density (HDPE) and low-density polyethylene (LDPE) discrimination is challenging but a clear step-by-step guide is provided that identified 78% of ingested PE samples. The optimal cleaning methods consisted of wiping ingested pieces with water or cutting. Of 828 ingested plastics pieces from 50 Pacific sea turtles, 96% were identified by ATR FT-IR as HDPE, LDPE, unknown PE, polypropylene (PP), PE and PP mixtures, polystyrenepolyvinyl chloride, and nylon.

Citation Information

Publication Year 2018
Title Validation of ATR FT-IR to identify polymers of plastic marine debris, including those ingested by marine organisms
DOI 10.1016/j.marpolbul.2017.12.061
Authors Melissa R. Jung, F. David Horgen, Sara V. Orski, Viviana Rodriguez, Kathryn L. Beers, George H. Balazs, T. Todd Jones, Thierry M. Work, Kayla C. Brignac, Sarah-Jeanne Royer, David K. Hyrenbach, Brenda A. Jensen, Jennifer M. Lynch
Publication Type Article
Publication Subtype Journal Article
Series Title Marine Pollution Bulletin
Series Number
Index ID 70197549
Record Source USGS Publications Warehouse
USGS Organization National Wildlife Health Center

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