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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.A.
dc.contributor.authorAnjos, Ofélia
dc.contributor.authorPereira, Helena
dc.date.accessioned2017-06-09T11:20:00Z
dc.date.available2017-06-09T11:20:00Z
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.J.A., Anjos, O., Pereira, H. (2015). Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy. Forest Systems, Volume 24, Issue 2, eRC03, 6 pagespt_PT
dc.identifier.doihttp://dx.doi.org/10.5424/fs/2015242-07580pt_PT
dc.identifier.issn2171-9845
dc.identifier.urihttp://hdl.handle.net/10400.5/13747
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherINIApt_PT
dc.relationPEst-OE/AGR/UI0239-2014pt_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.titleForest Systemspt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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