Chia trace elements detection by neutron activation analysis / Detecção de elementos traço de chia por análise de ativação neutrônica

Gabriel de Souza Chierentin, Maria José Aguirre Armelin, Nélida Lucia del Mastro


Chia seed is an ancient grain that is becoming popular in modern food regimen for their nutritional value and functional properties, although many tables of food composition do not provide complete information about it. Trace and ultra-trace elements are indispensable for human health as they are involved in biochemistry regulations, such as transport and oxygen activation, electron transport, catalytic center in oxide reduction processes, catalytic center in acid-base processes and structural function. For both diet assessment and prescription, reference values for trace elements as recommended daily intake, recommended dietary allowance and tolerable upper intake level were established. Instrumental neutron activation analysis (INAA) is a noble method to identify and quantify trace and ultra-trace elements that has high sensitivity for many elements, has little or no sample contamination, resulting in low blank values, has virtually no matrix effects and multi element capability. The aim of the present work was to identify and quantify by INAA mineral elements of chia seeds. The results showed higher content of Ca, K, Zn and Fe when compared with data from the literature obtained by other analytical methods. Besides that, using INAA was possible to detect elements that was not commonly verified with others measuring methods.





Chia (Salvia hispanica L.), Trace Elements, Neutron Activation Analysis.

Full Text:



V. Zettel, B. Hitzmann. Applications of chia (Salvia hispanicaL.) in food products. Trends in Food Science & Technology, v. 80, pp. 43-50, 2018.

B. Kulczynski, J. Kobus-Cisowska, M. Taczanowski, D. Kmiecik, A. Gramza-Michałowska. The Chemical Composition and Nutritional Value of Chia Seeds—Current State of Knowledge. Nutrients, v. 11(6), 2019.

P.A. Tsuji, J.A. Canter, L.E. Rosso. Trace Minerals and Trace Elements. Encyclopedia of Food and Health, pp. 331-338, 2016.

E. J. Baran. Suplementação de elementos-traços. Cadernos temáticos de química nova na escola, v. 6, pp. 7-12, 2005.

M. M. Sathler, P. M. B. Salles, M. Â. B. C. Menezes. Trace elements detection in whole food samples by neutron activation analysis, k0-method. International Nuclear Atlantic Conference - INAC 2017, Belo Horizonte, MG, Brazil, 2017.

J. M. A. Lenihan, S. J. Thomson, Activation analysis - principles and applications. Academic Press, London and New York, 1965.

Agência Nacional de Vigilância Sanitária. Resolução da Diretoria Colegiada. – RDC 54, 12 de novembro, 2012.

D.L. Hatfield, V.N. Gladyshev. How selenium has altered our understanding of the genetic code. Mol. Cell. Biol. v..22, pp. 3565–76, 2002.

P. Pająk, R. Socha, J. Broniek, K. Królikowska, T. Fortuna. Antioxidant properties, phenolic and mineral composition of germinated chia, golden flax, evening primrose, phacelia and fenugreek. Food Chemistry, v. 275, pp. 69-76, 2019.

D. Barreto, E. M. R. Gutierrez, M. R. Silva, F. O. Silva, N. O. C. Silva, I. C. A. Lacerda, R. A. Labanca, R. L. B. Araújo. Characterization and Bioaccessibility of Minerals in Seeds of Salvia hispanica L. American Journal of Plant Sciences, v. 7, pp. 2323-2337, 2016.

Universidade de São Paulo (USP). Food Research Center (FoRC). Tabela Brasileira de Composição de Alimentos (TBCA), Versão 7.0. São Paulo, 2019. Access: 15/10/2019, available:

U.S. Department of Agriculture, Agricultural Research Service. FoodData Central, 2019. Access: 15/10/2019, available



  • There are currently no refbacks.