Publicação
Non-destructive measurement of mandarin orange quality parameters with visible-near infrared spectroscopy
| Resumo: | The development of sensors to measure fruit internal quality variables is one of the challenges of post-harvest technology. Visible-near infrared spectroscopy (Vis/NIRS) has been a promise technique for nondestructive fruit quality assessment. This study was focused to evaluate the use of Vis/NIRS in measuring the quality parameters of intact mandarin orange fruit (Citrus clementina). The parameters studied were: firmness, color (CIEL*a*b*), peel thickness, soluble solids content (SSC), pH and total acidity (TA). A total of 120 mandarin fruit with different maturation were sampled. Reflectance NIR spectra were collected in four points of each fruit and the fruits were posteriorly analyzed for the physico-chemical parameters. Prediction models were selected based on the highest r2, lowest standard error of calibration (RMSEC) and lower number of factors used in the calculation. For color parameters (L*, a*, and b*) model had a mean square error of calibration (RMSEC) of 0.877, 1.780 and 1.589 and coefficient determination (r2) of 0.923, 0.963 and 0.852, respectively. The proposed model for the SSC had a RMSEC of 0.314 and r2 of 0.749. The results indicate that Vis/NIRS technique could provide an accurate, reliable and nondestructive method for assessing the internal quality indices. |
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| Autores principais: | Paulo, Luísa |
| Outros Autores: | Resende, Mafalda; Nunes, André; Pintado, Cristina Miguel; Antunes, Paulo |
| Assunto: | maturation Vis/NIRS chemometrics |
| Ano: | 2015 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Castelo Branco |
| Idioma: | inglês |
| Origem: | Repositório Científico do Instituto Politécnico de Castelo Branco |
| Resumo: | The development of sensors to measure fruit internal quality variables is one of the challenges of post-harvest technology. Visible-near infrared spectroscopy (Vis/NIRS) has been a promise technique for nondestructive fruit quality assessment. This study was focused to evaluate the use of Vis/NIRS in measuring the quality parameters of intact mandarin orange fruit (Citrus clementina). The parameters studied were: firmness, color (CIEL*a*b*), peel thickness, soluble solids content (SSC), pH and total acidity (TA). A total of 120 mandarin fruit with different maturation were sampled. Reflectance NIR spectra were collected in four points of each fruit and the fruits were posteriorly analyzed for the physico-chemical parameters. Prediction models were selected based on the highest r2, lowest standard error of calibration (RMSEC) and lower number of factors used in the calculation. For color parameters (L*, a*, and b*) model had a mean square error of calibration (RMSEC) of 0.877, 1.780 and 1.589 and coefficient determination (r2) of 0.923, 0.963 and 0.852, respectively. The proposed model for the SSC had a RMSEC of 0.314 and r2 of 0.749. The results indicate that Vis/NIRS technique could provide an accurate, reliable and nondestructive method for assessing the internal quality indices. |
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