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Determination of 226Ra in cheese produced in the rural area of Pernambuco-Brazil


This work is aimed at determining 226Ra concentration in cheese produced by dairy manufacturers from Pedra and Venturosa, which are two districts in the rural region of Pernambuco-Brazil. Analyses showed concentrations of 226Ra in cheese samples varying from 54 to 2,080 mBq kg−1 (wet matter). Using the cumulated risk method, the excess carcinoma and bone sarcoma were estimated for chronic ingestion of cheese containing this radioisotope. In this context, this report discusses the methodology of sample analyses as well as possible consequences of the 226Ra intake for human health.

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This research was supported by CAPES – Coordenação de Aperfeiçoamento de Pessoal de Nível Superior and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq–Brazil).

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Correspondence to C. M. Silva.

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Silva, C.M., Amaral, R.S. & Amaral, A. Determination of 226Ra in cheese produced in the rural area of Pernambuco-Brazil. Bull Environ Contam Toxicol 79, 336–339 (2007).

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  • Radium ingestion
  • Cancer risk
  • Anomalous radioactivity