| dc.creator | RUIZ,JOSÉ | |
| dc.creator | RODRIGUEZ,JAIME | |
| dc.creator | BAEZA,JAIME | |
| dc.creator | FREER,JUANITA | |
| dc.date | 2005-09-01 | |
| dc.date.accessioned | 2017-03-07T15:33:00Z | |
| dc.date.available | 2017-03-07T15:33:00Z | |
| dc.identifier | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000300007 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/387042 | |
| dc.description | The application of near-infrared (NIR) spectroscopy as a tool for the rapid determination of pulp yield and basic density of Eucalyptus globulus wood is described. Previously, we had examined these properties using mid-infrared (MIR) spectroscopy. More precise results were obtained based on NIR spectra where the calibrations models were more robust and better predictors than obtained for the MIR spectra. Twenty-seven samples were used for establishing the correlations (calibration) and three for making predictions based on the calibration (validation). Quant+ chemometrics software was used to obtain the calibration and prediction through principal components regression (PCR). A PCR model based on NIR spectra gave fits with a standard error of prediction (SEP) of 14.3 kg m-3 and 1.57% for basic density and pulping yield, respectively. Using PCR-MIR, the SEP values obtained were 21.44 kg m-3 and 1.73%. The method readily predicts yield (correlation coefficient: R²= 0.51), and density (correlation coefficient: R² = 0.94) from spectral NIR measurement. Both NIR and MIR performed better in the analysis of the density property than for the pulp yield of the hardwood samples | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Sociedad Chilena de Química | |
| dc.source | Journal of the Chilean Chemical Society v.50 n.3 2005 | |
| dc.subject | Near-infrared spectroscopy | |
| dc.subject | Quant+ | |
| dc.subject | E.globulus | |
| dc.title | ESTIMATING DENSITY AND PULPING YIELD OF E. globulus WOOD: COMPARISON OF NEAR-INFRARED (NIR) AND MID-INFRARED (MIR) | |
| dc.type | Artículos de revistas | |
