The levels of stable strontium (principally Y3r) in human tissues are now of some importance for two reasons.In investigation of bone disorders and of rates of calcification in man stable Sr has been used as a tracer for calcium in order to avoid the inevitable, if small, radiation dose to tissue which follows the use of radioactive Ca (Fraser, Harrison & Ibbertson, 1960).Secondly, when considering the uptake into the skeleton and turnover within the body of the 90Sr derived from fallout, it has been realized that these must depend more closely on the behaviour of stable Sr than of Ca since there is some physiological discrimination between the two elements during intestinal absorption, renal excretion and milk secretion and across the placenta (Bryant & Loutit, 1961, 1964).
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R.H. Mole (1965) studied this question.