Natural and artificial radionuclides in tea samples determined with gamma spectrometry
- 80 Downloads
The aim of the present work is to determine natural and artificial radioactivities in the twenty tea samples available at the local Vietnamese market using gamma spectrometry with HPGe detector. The radioactivity concentrations of 238U, 232Th, 40K and 137Cs in their mean value were 3.4 ± 0.3 (Bq kg−1), 16.4 ± 0.8 (Bq kg−1), 564 ± 8 (Bq kg−1), and 1.6 ± 0.1 (Bq kg−1), respectively. The result was compared with the those found in the previous research.
KeywordsGamma spectrometry Tea Natural and artificial radioactivity
The authors would like to express our thanks to the two anonymous reviewers of this manuscript, for their critical review and helpful discussions.
- 7.World Health Organization (2011) Guidelines for drinking-water quality. WHO Publications, GenevaGoogle Scholar
- 9.International Atomic Energy Agency (1987) Preparation of γ-ray spectrometry reference materials RGU-1, RGTh-1 and RGK-1. Report-IAEA/RL/148, ViennaGoogle Scholar
- 11.Lépy MC, Ferreux L, Hamon C, Plagnard J (2008) Logiciel d’ajustement des courbes de rendement ACORES, Note technique LNHB 2008-45Google Scholar
- 12.GUM (2008) Evaluation of measurement data—introduction to the “Guide to the expression of uncertainty in measurement” and related document, BIPM. http://www.bipm.org
- 13.Food and Agriculture Organization of the United Nations (1995) Codex general standard for contamination and toxins in food and feed. Codex Stand:193–1995Google Scholar
- 14.Food and Agriculture Organization of the United Nations (2015) World tea production and trade current and future development. FAO Publications, GeneveGoogle Scholar
- 15.Population Reference Bureau (2013) 2013 world population data sheetGoogle Scholar