X-ray scattering information of ED-XRF technique for powdered fruit juice mixes

Autor: Maria Izabel M. S. Bueno, Fabíola Manhas Verbi Pereira, H. L. Fernandes, A. G. Lima, S. C. L. Pinheiro, Eduardo Costa Figueiredo, Alessandra Sussulini
Rok vydání: 2009
Předmět:
Zdroj: X-Ray Spectrometry. 38:254-257
ISSN: 1097-4539
0049-8246
DOI: 10.1002/xrs.1158
Popis: The initial main objective of this study was to evaluate the potentiality of energy-dispersive x-ray fluorescence (ED-XRF) and principal component analysis (PCA) for qualitative analysis of artificial powdered fruit juice mixes. The X-ray spectroscopy (XRS) technique can be useful for preliminary studies of food and beverage samples, such as metal content in this type of sample. In addition, sample pretreatment is not required, offering very fast acquisition of results. XRF spectra were obtained using an ED-XRF system equipped with an Rh target x-ray tube. The spectral region related to x-ray scattering from the light elements (C, H, and O, among others) of the samples matrix. Specifically, x-ray scattering was verified in the region (from 18.00 to 24.00 keV) where Compton and Rayleigh effects occur by the x-ray source of conventional equipment of ED-XRF. This region combined with PCA showed distinction of the samples with and without artificial sweeteners in their composition. In addition, two different artificial sweeteners (aspartame and cyclamate) were detected by x-ray scattering. These results have paved way for the versatile ED-XRF application for analyses of inorganic and organic composition in food and beverage samples, without pretreatment. Copyright © 2009 John Wiley & Sons, Ltd.
Databáze: OpenAIRE
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