Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 318, Issue -, Pages 202-206Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2013.05.105
Keywords
PIXE; Micro-PIXE; RBS; Coffee; Roasted coffee bean; Green coffee bean
Categories
Funding
- CAPES (Coordenacao de pessoal de Nivel Superior)
- CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico)
- FAPERGS (Fundacao de Amparo a Pesquisa do Estado do Rio Grande do Sul)
- CNPq [158137/2011-6]
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The way that coffee is prepared (using roasted ground coffee or roasted coffee beans) may influence the quality of beverage. Therefore, the aim of this work is to use ion beam techniques to perform a full elemental analysis of packed roasted ground coffee and packed roasted coffee beans, as well as green coffee beans. The samples were analyzed by PIXE (particle-induced X-ray emission). Light elements were measured through RBS (Rutherford backscattering spectrometry) experiments. Micro-PIXE experiments were carried out in order to check the elemental distribution in the roasted and green coffee beans. In general, the elements found in ground coffee were Mg, P, S, Cl, K, Ca, Ti, Mn, Fe, Cu, Zn, Rb and Sr. A comparison between ground coffee and grinded roasted beans shows significant differences for several elements. Elemental maps reveal that P and K are correlated and practically homogeneously distributed over the beans. (C) 2013 Elsevier B.V. All rights reserved.
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