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Assessment of internal quality attributes of mandarin fruit. 2. NIR calibration model robustness

Guthrie, J.A. and Reid, D.J. and Walsh, K.B. (2005) Assessment of internal quality attributes of mandarin fruit. 2. NIR calibration model robustness. Australian Journal of Agricultural Research, 56 (4). pp. 417-426.

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Article Link(s): http://dx.doi.org/10.1071/AR04299

Publisher URL: http://www.publish.csiro.au

Abstract

The robustness of multivariate calibration models, based on near infrared spectroscopy, for the assessment of total soluble solids (TSS) and dry matter (DM) of intact mandarin fruit (Citrus reticulata cv. Imperial) was assessed. TSS calibration model performance was validated in terms of prediction of populations of fruit not in the original population (different harvest days from a single tree, different harvest localities, different harvest seasons). Of these, calibration performance was most affected by validation across seasons (signal to noise statistic on root mean squared error of prediction of 3.8, compared with 20 and 13 for locality and harvest day, respectively). Procedures for sample selection from the validation population for addition to the calibration population (‘model updating’) were considered for both TSS and DM models. Random selection from the validation group worked as well as more sophisticated selection procedures, with approximately 20 samples required. Models that were developed using samples at a range of temperatures were robust in validation for TSS and DM.

Item Type:Article
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version may be available via Publisher’s website.
Keywords:NIR; non-invasive.
Subjects:Technology > Technology (General) > Spectroscopy > NIR (Near Infrared)
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit
Deposited On:08 Nov 2005
Last Modified:17 Jun 2011 01:16

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