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|Type:||Artigo de periódico|
|Title:||Analysis Of Beers From Brazil With Synchrotron Radiation Total Reflection X-ray Fluorescence|
De Jesus E.F.O.
Nascimento Filho V.F.
|Abstract:||In this study the concentrations of P, S, Cl, K, Ca, Mn, Fe, Zn and Br in twenty-nine brands of national and international beers were determined by synchrotron radiation total reflection X-ray fluorescence analysis (SR-TXRF). The results were compared with the limits established by the Brazilian legislation and the nutritional values established by National Agricultural Library (NAL, USA). The measurements were performed at the X-Ray Fluorescence Beamline at Brazilian National Synchrotron Light Laboratory, in Campinas, São Paulo, Brazil, using a polychromatic beam for excitation. A small volume of 5 μl of beers containing an internal standard used to correct geometry effects was analyzed without pretreatment. The measuring time was 100 seconds and the detection limits obtained varied from 1 μg·l -1 for Mn and Fe to 15 μg·l-1 for P. © 2006 Akadémiai Kiadó.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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