Neutron activation analysis for assessing chemical composition of dry dog foods

Author(s)

Elias, Camila ^[1] ; De Nadai Fernandes, Elisabete A. ^[1] ; Bacchi, Marcio Arruda ^[1]

Affiliation

^[1] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13416970 Piracicaba - Brazil

• Document type: Journal article
• Source: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY; v. 291, n. 1, p. 245-250, JAN 2012.
• Web of Science Citations: 8

Abstract

Brazil holds the second largest population of domestic dogs in the world, with 33 million dogs, only behind the United States. The annual consumption of dog food in the country is 1.75 million tons, corresponding to the World's sixth in trade turnover. Dog food is supposed to be a complete and balanced diet, formulated with high quality ingredients. All nutrients and minerals required for an adequate nutrition of dogs are added to the formulation to ensure longevity and welfare. In this context, the present study aimed at assessing the chemical composition of dry dog foods commercialized in Brazil. Thirty-four samples were acquired in the local market of Piracicaba and analyzed by instrumental neutron activation analysis (INAA) to determine the elements As, Br, Ca, Co, Cr, Cs, Fe, K, La, Na, Rb, Sb, Sc, Se, U, and Zn. In general, the concentrations of Ca, Fe, K, Na, and Zn complied with the values required by the Association of American Feed Control Officials (AAFCO). To evaluate the safety of dog food commercialized in Brazil, further investigation is necessary to better understand the presence of toxic elements found in this study, i.e. Sb and U. INAA was useful for the screening analysis of different types and brands of dry dog foods for the determination of both essential and toxic elements. (AU)

• FAPESP's process: 10/52425-7 - Nutritional quality of dog food: influence of zinc in the absorption of copper and in the prevention of hepatic disease
• Grantee: Camila Elias
• Support Opportunities: Scholarships in Brazil - Doctorate