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Optica Publishing Group
  • Journal of Near Infrared Spectroscopy
  • Vol. 11,
  • Issue 5,
  • pp. 323-332
  • (2003)

Internal Quality Assessment of Mandarin Fruit by vis/NIR Spectroscopy

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Abstract

Different measurement modes (reflectance, interactance and transmission) and spectral windows (500–1100 nm) were compared for their ability to predict non-destructively the harvest soluble solids content (SSC) and titratable acidity (TA) of Satsuma Mandarin (Citrus reticulata cv. “Miyagawa”). A direct transmission measurement mode (source and sensor opposite sides of fruit) coupled with a single spectral window from 700 to 930 nm delivered the most accurate SSC predictions (R2 = 0.93, RMSEP = 0.32%). Accurate TA prediction was not possible with any measurement mode and the predictive ability that was achieved (best results: R2 ∼ 0.65, RMSEP ∼ 0.15%) was only afforded indirectly through a correlation with the skin chlorophyll changes that occur as the fruit mature.

© 2003 NIR Publications

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