A Near Infrared Spectroscopy NIRS and Chemometric Approach to Improve Apple Fruit Quality Management: A Case Study on the Cultivars -Cripps Pink- and -BraeburnReportar como inadecuado




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1

Laimburg Research Centre for Agriculture and Forestry, Laimburg 6—Pfatten Vadena, Auer Ora 39040, BZ, Italy

2

Institute of Analytical Chemistry and Radiochemistry, CCB—Center for Chemistry and Biomedicine, Leopold-Franzens University, Innrain 80–82, Innsbruck 6020, Austria





*

Author to whom correspondence should be addressed.



Academic Editor: Derek J. McPhee

Abstract The potential of near infrared spectroscopy NIRS in the wavelength range of 1000–2500 nm for predicting quality parameters such as total soluble solids TSS, acidity TA, firmness, and individual sugars glucose, fructose, sucrose, and xylose for two cultivars of apples -Braeburn- and -Cripps Pink- was studied during the pre- and post-storage periods. Simultaneously, a qualitative investigation on the capability of NIRS to discriminate varieties, harvest dates, storage periods and fruit inhomogeneity was carried out. In order to generate a sample set with high variability within the most relevant apple quality traits, three different harvest time points in combination with five different storage periods were chosen, and the evolution of important quality parameters was followed both with NIRS and wet chemical methods. By applying a principal component analysis PCA a differentiation between the two cultivars, freshly harvested vs. long-term stored apples and, notably, between the sun-exposed vs. shaded side of apples could be found. For the determination of quality parameters effective prediction models for titratable acid TA and individual sugars such as fructose, glucose and sucrose by using partial least square PLS regression have been developed. Our results complement earlier reports, highlighting the versatility of NIRS as a fast, non-invasive method for quantitative and qualitative studies on apples. View Full-Text

Keywords: Malus x domestica -Braeburn-; Malus x domestica -Cripps Pink-; near infrared spectroscopy; NIRS; internal quality; firmness; sugars; apples Malus x domestica -Braeburn-; Malus x domestica -Cripps Pink-; near infrared spectroscopy; NIRS; internal quality; firmness; sugars; apples





Autor: Daniela Eisenstecken 1,2, Alessia Panarese 1, Peter Robatscher 1, Christian W. Huck 2, Angelo Zanella 1 and Michael Oberhuber 1,*

Fuente: http://mdpi.com/



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