Quenching effect of iron on uranium concentration measurements by fluorimetry in biological samples

Iron is considered as a strong quencher that reduce the uranium fluorescence in biological sample. This effect was studied by two methods. In the first method iron concentration was fixed to study the effect on different uranium standard solutions. In the second method the concentration of uranium standard solutions were fixed while different amounts of iron were added if has been found that the quenching effect of iron is the same in low concentration of uranium, while in high concentration of uranium the quenching effect is greater. (author). 1 ref., 4 tabs