Total anthocyanin content determination in intact açaí (Euterpe oleracea Mart.) and palmitero-juçara (Euterpe edulis Mart.) fruit using near infrared spectroscopy (NIR) and multivariate calibration
| Autor: | Gustavo Henrique de Almeida Teixeira, Valquiria Garcia Lopes, Kássio M. G. Lima, Maria Raquel Cavalcanti Inácio, José Dalton Cruz Pessoa |
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| Rok vydání: | 2012 |
| Předmět: |
Multivariate calibration
Calibration (statistics) Analytical chemistry Non-destructive method PLS Arecaceae Analytical Chemistry Anthocyanins chemistry.chemical_compound Partial least squares regression Food science Euterpe edulis Mathematics Detection limit Spectroscopy Near-Infrared biology Plant Extracts Content determination Near-infrared spectroscopy Net analyte signal General Medicine biology.organism_classification NIRS chemistry Anthocyanin Fruit Calibration Multivariate Analysis Variables selection Food Science |
| Zdroj: | Food chemistry. 136(3-4) |
| ISSN: | 1873-7072 |
| Popis: | The aim of this study was to evaluate near-infrared reflectance spectroscopy (NIR), and multivariate calibration potential as a rapid method to determinate anthocyanin content in intact fruit (acai and palmitero-jucara). Several multivariate calibration techniques, including partial least squares (PLS), interval partial least squares, genetic algorithm, successive projections algorithm, and net analyte signal were compared and validated by establishing figures of merit. Suitable results were obtained with the PLS model (four latent variables and 5-point smoothing) with a detection limit of 6.2 g kg(-1), limit of quantification of 20.7 g kg(-1), accuracy estimated as root mean square error of prediction of 4.8 g kg(-1), mean selectivity of 0.79 g kg(-1), sensitivity of 5.04×10(-3) g kg(-1), precision of 27.8 g kg(-1), and signal-to-noise ratio of 1.04×10(-3) g kg(-1). These results suggest NIR spectroscopy and multivariate calibration can be effectively used to determine anthocyanin content in intact acai and palmitero-jucara fruit. |
| Databáze: | OpenAIRE |
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