Publicação
Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy
| dc.contributor.author | Santos, António J.A. | |
| dc.contributor.author | Anjos, Ofélia | |
| dc.contributor.author | Pereira, Helena | |
| dc.date.accessioned | 2015-09-24T14:53:34Z | |
| dc.date.available | 2015-09-24T14:53:34Z | |
| dc.date.issued | 2015 | |
| dc.description | Resource Communication | por |
| dc.description.abstract | Aim 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) | por |
| dc.description.sponsorship | FCT (PEst-OE/AGR/UI0239-2014) | por |
| dc.identifier.citation | Santos, 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 pages | por |
| dc.identifier.doi | http://dx.doi.org/10.5424/fs/2015242-07580 | |
| dc.identifier.uri | http://hdl.handle.net/10400.5/9261 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | INIA (Es) | por |
| dc.subject | Acacia melanoxylon | por |
| dc.subject | unbleached kraft pulps | por |
| dc.subject | ISO brightness | por |
| dc.subject | NIR | por |
| dc.subject | RPD | por |
| dc.title | Estimation of Acacia melanoxylon unbleached Kraft pulp brightness by NIR spectroscopy | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.title | Forest Systems | por |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |