Radioisotope Dilution Technique for Determination of Zinc Absorption in vivo
- 1 January 1976
- journal article
- research article
- Published by S. Karger AG in Annals of Nutrition and Metabolism
- Vol. 20 (5) , 307-313
- https://doi.org/10.1159/000175715
Abstract
A radioisotope dilution technique was adapted for determination of the absorbability of dietary zinc. In 16 growing rats given a casein diet with 12.8 mg Zn/kg dry matter, a mean apparent Zn digestibility of 72.4 % was observed in a 6-day balance period 9 days after an intramuscular injection of 65Zn-ZnCl2. There was no significant difference in the specific radioactivity of zinc in blood plasma on day 15 and in urine collected from day 9 to day 15 used to assess the fecal excretion of endogenous zinc. Consequently, there was good agreement between the corresponding mean zinc absorbability (94.8 vs. 95.3 %) calculated from these data.Keywords
This publication has 1 reference indexed in Scilit:
- Radiophosphorus (P32) as Tracer for Measuring Endogenous Phosphorus in Cow’s FecesJournal of Nutrition, 1951