Potassium concentrations and annual effective dose of the customary food stuffs in Mexico

作者：Martinez T^*; Ramirez A; Navarrete M; Vargas G J; Portilla V; Fernandez A

来源：Journal of Radioanalytical and Nuclear Chemistry, 2014, 299(1): 835-838.

DOI：10.1007/s10967-013-2705-6

• Potassium
• Potassium 40
• Effective dose
• Foodstuffs

Measurement of radionuclides concentration in foodstuffs allows to assess the intake's assimilated dose. This contributes at least one-eighth of the mean annual effective dose due to natural sources. Among the trace elements in foodstuff, potassium is one of the most important elements. It is a well-known essential element and it occurs all over the earth. Three of the most customary consumed foodstuffs in Mexico since pre-Hispanic time (by all social classes) are the following: bean, chili and corn meal ("tortillas"). They were analyzed by gamma-spectrometry in order to determine K-40 activity concentration, the derived annual effective dose, and the K mass fraction (%). Results show that the mean activity concentration of K-40, annual effective dose and K mass fraction (%) are as follow: 901 +/- A 90 Bq kg(-1), 37.2 +/- A 3.7 mu Sv a(-1) and 2.84 +/- A 0.27 % for chili; 510 +/- A 10 Bq kg(-1), 27.5 +/- A 0.5 mu Sv a(-1) and 1.60 +/- A 0.04 % for bean; and, 90 +/- A 30 Bq kg(-1), 58.1 +/- A 19.4 mu Sv a(-1) and 0.27 +/- A 0.089 % for corn meal, "masa". The total effective dose intake from these typical foodstuffs is about 0.122 +/- A 15.6 mSv a(-1)in Mexico's urban zones.

• 出版日期2014-1