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Identification of Environmental Plastic Samples from a Caribbean Beach Survey by Near-Infrared Spectroscopy with the MicroNIR and Chemometric Analysis
Örebro University, School of Science and Technology, Örebro University, Sweden.
2015 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

MicroNIR is a portable near-infrared diffuse reflection spectroscope. Its suitability for identifying environmental plastic polymers was evaluated through a series of performance tests. The plastic samples were collected during a beach survey in the Caribbean. First a reference database was built by analysing a series of reference plastic polymers. Prediction models were constructed by using principal component analysis (PCA) and cluster analysis on 2D- and 3D-scatterplots. Measurements of samples with a surface area down to 1 mm2 were successfully identified with the prediction models. Blend spectra were created by measuring two polymers simultaneously, from which each polymer NIR-fingerprint were able to be individually extracted from the blend spectra by subtracting the NIR-fingerprint of the opposite polymer. Prediction models were used to identify the samples in the tests with household plastics and the environmental plastic samples, collected in the Caribbean. Out of the forty-eight samples collected forty (83%) were identified. Twenty-seven were identified as polyethylene (56%), eleven as polypropylene (23%), one as polystyrene (2%), and one as polyamide (2%).

Place, publisher, year, edition, pages
2015.
Keyword [en]
MicroNIR, Near-infrared spectroscopy, Chemometrics, Plastic polymer identification, Environmental plastic beach survey
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:oru:diva-45772OAI: oai:DiVA.org:oru-45772DiVA: diva2:852588
Subject / course
Chemistry
Supervisors
Examiners
Available from: 2015-09-09 Created: 2015-09-09 Last updated: 2015-09-09Bibliographically approved

Open Access in DiVA

fulltext(5874 kB)124 downloads
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File name FULLTEXT01.pdfFile size 5874 kBChecksum SHA-512
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School of Science and Technology, Örebro University, Sweden
Chemical Sciences

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf