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 °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 nm). 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.

Time-resolved and continuous wave NIR reflectance spectroscopy to predict soluble solids content and firmness of pear

CUBEDDU, RINALDO;PIFFERI, ANTONIO GIOVANNI;TORRICELLI, ALESSANDRO
2008-01-01

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 °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 nm). 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.
2008
File in questo prodotto:
File Dimensione Formato  
Nicolai_PostharvestBiolTech_47_68_2008.pdf

Accesso riservato

: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 974.74 kB
Formato Adobe PDF
974.74 kB Adobe PDF   Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/544653
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 178
  • ???jsp.display-item.citation.isi??? 143
social impact