Authors:
F. S. Tagliaferro Nuclear Energy Center for Agriculture, University of S?o Paulo (CENA/USP) Av. Centenário 303, 13416-000, Piracicaba, S?o Paulo, Brazil

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E. A. De Nadai Fernandes Nuclear Energy Center for Agriculture, University of S?o Paulo (CENA/USP) Av. Centenário 303, 13416-000, Piracicaba, S?o Paulo, Brazil

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M. A. Bacchi Nuclear Energy Center for Agriculture, University of S?o Paulo (CENA/USP) Av. Centenário 303, 13416-000, Piracicaba, S?o Paulo, Brazil

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Summary  

A random sampling was carried out in the coffee beans collected for the preparation of the organic green coffee reference material in view of assessing the homogeneity and the presence of soil as impurity. Fifteen samples were taken for the between-sample homogeneity evaluation. One of the samples was selected and 10 test portions withdrawn for the within-sample homogeneity evaluation. Br, Ca, Co, Cs, Fe, K, Na, Rb, Sc and Zn were determined by instrumental neutron activation analysis (INAA). The F-test demonstrated that the material is homogeneous for Ca, Co, Cs, K and Sc, but not homogeneous for Br, Fe, Na, Rb and Zn. Results of terrigenous elements suggested negligible soil contamination in the raw material.

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Journal of Radionalytical and Nuclear Chemistry
Language English
Size A4
Year of
Foundation
1968
Volumes
per Year
1
Issues
per Year
12
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0236-5731 (Print)
ISSN 1588-2780 (Online)