Rapid Estimation of Potato Quality Parameters by a Portable Near-Infrared Spectroscopy Device.

Abstract

The aim of the present work was to determine the main quality parameters on tuber potato using a portable near-infrared spectroscopy device (MicroNIR). Potato tubers protected by the Protected Geographical Indication (PGI "Patata de Galicia", Spain) were analyzed both using chemical methods of reference and also using the NIR methodology for the determination of important parameters for tuber commercialization, such as dry matter and reducing sugars. MicroNIR technology allows for the attainment/estimation of dry matter and reducing sugars in the warehouses by directly measuring the tubers without a chemical treatment and destruction of samples. The principal component analysis and modified partial least squares regression method were used to develop the NIR calibration model. The best determination coefficients obtained for dry matter and reducing sugars were of 0.72 and 0.55, respectively, and with acceptable standard errors of cross-validation. Near-infrared spectroscopy was established as an effective tool to obtain prediction equations of these potato quality parameters. At the same time, the efficiency of portable devices for taking instantaneous measurements of crucial quality parameters is useful for potato processors.

Plant phenotyping relevance

携帯型NIR分光法を用いてジャガイモ塊茎の乾物および還元糖を非破壊推定し、化学基準法との比較と検量モデルの開発・検証を行っており、植物形質取得法が中心である。

Code and data availability

The paper reports NIR spectra and chemometric models for potato quality parameters, but the Data Availability Statement says 'Data is contained within the article' — no public dataset, code, or model deposit is provided. No qualifying paper-specific public assets exist.

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