The Journal of General Physiology, Vol 25, 345-353,
Copyright © 1942 by The Rockefeller University Press
THE RADIOACTIVITY OF POTASSIUM FROM HUMAN SOURCES
W. O. Fenn 1,
William F. Bale 1, and
Lorin J. Mullins 1
1 From the Department of Physiology and the Department of Radiology of the School of Medicine and Dentistry of The University of Rochester, Rochester, New York
A comparison of the radioactivity of potassium from human and commercial sources indicates that the radioactive isotope K40 is probably 1 or 2 per cent less abundant in human potassium.
Submitted on August 9, 1941