BUSCADOR RECOLECTA

This document is the accepted manuscript version of a published work that appeared in final form in Journal of Agricultural and Food Chemistry, copyright © American Chemical Society after peer review and technical editing by the publisher.
To access the final edited and published work see https://doi.org/10.1021/jf401292j, Potato (Solanum tuberosum L.) is one of the most important crops in the world being considered as a staple food
in many developing countries. The potato industry like other vegetable and fruit industries is subject to the current demand of
quality products. In order to meet this challenge, the food industry is relying on the adoption of nondestructive and
environmentally friendly techniques to determine quality of products. Near-infrared spectroscopy (NIRS) is currently one of the
most advanced nondestructive technologies regarding instrumentation and application, and it also complies with the
environment requirements as it does not generate emissions or waste. This paper reviews research progress on the analysis of
potatoes by NIRS both in terms of determination of constituents and classification according to the different constituents of the
tubers. A brief description of the fundamentals of NIRS technology and its advantages over other quality assessment techniques is
included. Finally, future prospects of the development of NIRS technology at the industrial level are explored., The funding of this work has been covered by Navarre
Government Technologists formation program and the Spanish
National Institute for Agricultural and Food Research and
Technology (INIA) project: “Genetic improvement of Potato. Characterization of the material by NIRS technology” RTA
2011-00018-C03-03.

This is a post-peer-review, pre-copyedit version of an article published in Food and Bioprocess Technology. The final authenticated version is available online at: https://doi.org/10.1007/s11947-015-1639-0, In this study, the optical properties of potato
flesh tissue were estimated using double-integrating
sphere (DIS) measurements combined with an inverse
adding-doubling (IAD) light propagation model. Total reflectance, total transmittance, and unscattered transmittance were measured for the wavelength range 500–
1900 nm with 5-nm resolution. From these measurements,
the bulk optical properties (absorption coefficient, scattering coefficient, and anisotropy factor) of 53 potato tubers
of the Hermes cultivar were estimated. The estimated absorption coefficient spectra were dominated by water and
starch absorption bands, the main chemical components
of potato tissue. Comparison of these values to those reported in literature for similar products showed comparable absorption profiles. The obtained scattering coefficient
spectra showed a smooth decrease from 166 to 160 cm−1
in the near-infrared (NIR) spectral range with increasing
wavelength, which is common for biological tissues. The
anisotropy factor spectra obtained for the full wavelength
range studied ranged between 0.949 and 0.959 with a
maximum variability of 0.009 among the set of samples
used. The information obtained in this study is essential to
understand the effects of absorption and scattering on the
propagation of light through the potato tubers in order to
design more efficient sensors for non-destructive quality
evaluation., The funding of this work has been covered by the
Universidad Pública de Navarra through the concession of both a predoctoral research grant and a mobility grant, by the National Institute for
Agricultural and Food Research and Technology (INIA) project:
BGenetic improvement of Potato. Characterization of the material by
NIRS technology^ RTA 2011-00018-C03-03, and by the Agency for
Innovation by Science and Technology in Flanders (IWT) through the
Chameleon (SB-100021) project.