Abstract
Samples of liquid milk from Hsinchu, fifteen varieties of powder milk from Taiwan, and imported powder milk from Holland, Denmark, United States of America, Japan, and Australia have been measured for their 90Sr and 137Cs contents. The average 90Sr and 137Cs content of Hsinchu milk is 2.5 pCi/gCa and 6.4 pCi/gK respectively between October 1968 and July 1969. The increase in the average level of 90Sr by a factor of 1.4 as compared with that in 1964 is attributed to the nuclear weapon tests at Lop Nor. The 90Sr and 137Cs contents in the Australian powder milk is found to be about the same and in the North European and American powder milk about two or three times that in Taiwan powder milk.
