FTIR spectroscopy supported by statistical techniques for the structural characterization of plastic debris in the marine environment: Application to monitoring studies.
Mar Pollut Bull
; 106(1-2): 155-61, 2016 May 15.
Article
em En
| MEDLINE
| ID: mdl-26997255
ABSTRACT
We inserted 190 FTIR spectra of plastic samples in a digital database and submitted it to Independent Component Analysis (ICA) to extract the "pure" plastic polymers present. These identified plastics were polypropylene (PP), high density polyethylene (HDPE), low density polyethylene (LDPE), high density polyethylene terephthalate (HDPET), low density polyethylene terephthalate (LDPET), polystyrene (PS), Nylon (NL), polyethylene oxide (OPE), and Teflon (TEF) and they were used to establish the similarity with unknown plastics using the correlation coefficient (r), and the crosscorrelation function (CC). For samples with r<0.8 we determined the Mahalanobis Distance (MD) as additional tool of identification. For instance, for the four plastic fragments found in the Carretta carretta, one plastic sample was assigned to OPE due to its r=0.87; for all the other three plastic samples, due to the r values ranging between 0.83 and0.70, the support of MD suggested LDPET and OPE as co-polymer constituents.
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Base de dados:
MEDLINE
Assunto principal:
Plásticos
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Resíduos
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Poluentes da Água
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Monitoramento Ambiental
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Espectroscopia de Infravermelho com Transformada de Fourier
Idioma:
En
Revista:
Mar Pollut Bull
Ano de publicação:
2016
Tipo de documento:
Article