Title: Time-resolved and continuous wave NIR reflectance spectroscopy to predict soluble solids content and firmness of pear
Authors: Nicolai, Bart ×
Verlinden, Bert
Desmet, Michele
Saevels, Stijn
Saeys, Wouter
Theron, Karen
Cubeddu, Rinaldo
Pifferi, Antonio
Torricelli, Alessandro #
Issue Date: Jan-2008
Publisher: Elsevier science bv
Series Title: Postharvest biology and technology vol:47 issue:1 pages:68-74
Abstract: Continuous wave (CW) and time-resolved (TRS) near infrared (NIR) reflectance measurements were carried out on 'Conference' pear fruit. While the absorption coefficient spectra obtained from the TRS measurements were dominated by the overtone of the hydroxyl moiety at 975 nm, the scattering coefficient spectra were almost flat. The spectral data were used to construct calibration models for the soluble solids content (SSC) and Magness Taylor firmness of 'Conference' pear fruit. Reasonable models for SSC (RMSEP = 0.44 degrees Brix) were obtained when the CW spectra in the range 780-1700 nm were used, but not when the range was limited to that of the TRS equipment (875-1030 rim). No satisfactory calibration model could be established between the TRS absorption coefficient spectrum and SSC. With none of the spectroscopic techniques could significant calibration models for firmness be constructed, although a highly nonlinear relationship between scattering coefficients at 900 nm and firmness was observed. (c) 2007 Elsevier B.V. All rights reserved.
ISSN: 0925-5214
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

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