NIRS and iSPA-PLS for predicting total anthocyanin content in jaboticaba fruit

• Published in: Food chemistry Vol. 174; pp. 643 - 648
• Main Authors: Mariani, Nathália Cristina Torres, de Almeida Teixeira, Gustavo Henrique, de Lima, Kássio Michell Gomes, Morgenstern, Thayara Bittencourt, Nardini, Viviani, Júnior, Luís Carlos Cunha
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01-05-2015
• Subjects: Anthocyanins - analysis; Anthocyanins - chemistry; Fruit - chemistry; iSPA-PLS; Jaboticaba; Myrtaceae - chemistry; NIRS; Plant Extracts - chemistry; PLS; Spectroscopy, Near-Infrared - methods; Wavelength selection; NIRS; iSPA-PLS; Jaboticaba; Wavelength selection; PLS
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2014.11.008

•NIRS and iSPA-PLS were applied to predict total anthocyanins content (TAC) in jaboticaba fruit.•The iSPA-PLS achieved RMSEP between 7.55gkg−1 and 9.35gkg−1.•The RPD ratios were in the range from 2.57 to 3.19.
The aim of this study was to evaluate the potential of the successive projection algorithm for interval selection in partial least squares (iSPA-PLS) together with near-infrared reflectance spectroscopy (NIRS) as a feasible method to determine the total anthocyanin content (TAC) of intact jaboticaba fruit [Myrciaria jaboticaba (Vell.) O. Berg]. A total of 579 jaboticaba fruit were collected in three different harvests in three separate years (2011 and 2013). The correlation coefficients between the predicted and measured TAC were between 0.65 and 0.89, the RMSEPs were 7.55gkg−1 and 9.35gkg−1 (good accuracy) for prediction set, respectively. The RPD ratios for TAC were in the range of 2.57–3.19 with iSPA-PLS, which showed better predictive performance (acceptable precision). These results suggest that the NIR spectroscopy and wavelength selection (iSPA-PLS) algorithm can be used to determine the TAC of intact jaboticaba fruit.