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Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy

2015Journal article Open access
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dc.contributor.authorSantos, António J.
dc.contributor.authorAnjos, O.
dc.contributor.authorPereira, Helena
dc.date.accessioned2017-07-22T16:34:45Z
dc.date.available2017-07-22T16:34:45Z
dc.date.issued2015
dc.description.abstractAim of the study: The ability of NIR spectroscopy for predicting the ISO brightness was studied on unbleached Kraft pulps of Acacia melanoxylon R. Br. Area of study: Sites covering littoral north, mid interior north and centre interior of Portugal. Materials and methods: The samples were Kraft pulped in standard identical conditions targeted to a kappa number of 15. A Near Infrared (NIR) partial least squares regression (PLSR) model was developed for the ISO brightness prediction using 75 pulp samples with a variation range of 18.9 to 47.9 %. Main results: Very good correlations between NIR spectra and ISO brightness were obtained. Ten methods were used for PLS analysis (cross validation with 48 samples), and a test set validation was made with 27 samples. The 1stDer pre-processed spectra coupling two wavenumber ranges from 9404 to 7498 cm-1 and 4605 to 4243 cm-1 allowed the best model with a root mean square error of ISO brightness prediction of 0.5 % (RMSEP), a r2 of 99.5 % with a RPD of 14.7. Research highlights: According to AACC Method 39-00, the present model is sufficiently accurate to be used for process control (RPD ≥ 8).pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSANTOS, A. ; ANJOS, O. ; PEREIRA, H. (2015) - Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy. Forest Systems. ISSN 2171-9845. 24:2. P. eRC03, 6 p.pt_PT
dc.identifier.doi10.5424/fs/2015242-07580pt_PT
dc.identifier.issn2171-9845
dc.identifier.urihttp://hdl.handle.net/10400.11/5618
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherInstituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA)pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAcacia melanoxylonpt_PT
dc.subjectUnbleached Kraft pulpspt_PT
dc.subjectISO Brightnesspt_PT
dc.subjectNIRpt_PT
dc.subjectRPDpt_PT
dc.titleEstimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue2pt_PT
oaire.citation.startPageeRC03pt_PT
oaire.citation.titleForest Systemspt_PT
oaire.citation.volume24pt_PT
person.familyNameAnjos
person.givenNameOfélia
person.identifier.ciencia-idC21D-D8C7-3037
person.identifier.orcid0000-0003-0267-3252
person.identifier.ridG-2808-2012
person.identifier.scopus-author-id23395659700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationdf9191ae-0bbb-4bb8-bbdc-0f79c7365876
relation.isAuthorOfPublication.latestForDiscoverydf9191ae-0bbb-4bb8-bbdc-0f79c7365876

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