| Título: | Fruit juice authentication by 1 H NMR spectroscopy in combination with different chemometrics tools |
| Autores: | M. CUNY, Autor ; E. VIGNEAU, Autor ; G. LE GALL, Autor ; I. COLQUHOUN, Autor ; LEES, M., Autor ; D. N. RUTLEDGE, Autor |
| Tipo de documento: | texto impreso |
| ISBN/ISSN/DL: | 68159 |
| Dimensiones: | pp. 419–427 |
| Nota general: | En: Anal Bioanal Chem (2008) 390:419–427 |
| Langues: | Inglés |
| Clasificación: | |
| Resumen: |
To discriminate orange juice from grapefruit juice
in a context of fraud prevention, 1 H NMR data were sub-mitted to different treatments to extract informative variables which were then analysed using multivariate techniques. Averaging contiguous data points of the spectrum followed by logarithmic transformation improved the results of the data analysis. Moreover, supervised variable selection meth-ods gave better rates of classification of the juices into the correct groups. Last, independent-component analysis gave better classification results than principal-component analy-sis. Hence, ICA may be an efficient chemometric tool to detect differences in the 1 H NMR spectra of similar samples, and so may be useful for authentication of foods. |
