Assessment of selenium content in diets using two analytical methods a comparative study
Ratkowska, B. | Wojtasik, A. | Kunachowicz, H.(National Food and Nutrition Institute, Warsaw (Poland). Dept. of Nutritional Value of Food) | Marzec, Z.(Medical Academy, Lublin (Poland). Dept. of Bromatology) | Stibilj, V.(Josef Stefan Institute, Ljubljana (Slovenia))
The selenium content in the five lyophilised reconstructed Polish diets were determined with two analytical methods: fluorimetric method and method of radiochemical neutron activation analysis (RNAA). The results obtained with the RNAA method were lower than those obtained with the fluorimetric method, although the differences were statistically not significant. Considering diet mass after reconstruction and dry mass content in diets before and after lyophilization, the content of selenium was calculated in the daily diets. The mean selenium daily uptake calculated from RNAA results was from 19.02 microgram to 27.33 microgram. The mean selenium content in diets calculated on the basis of fluorimetric determinations was from 22.10 microgram to 32.78 microgram. The results indicated that the selenium content in Polish diets was relatively low. The coverage of the recommended intake of selenium varied from 40 percent to 70 percent, depending on the type of the household
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