Pleskach S D
Health Phys. 1985 Mar;48(3):303-7. doi: 10.1097/00004032-198503000-00007.
Urinalysis for natural U and Th was done by neutron activation. Percent recovery (+/- 1 sigma) was 80 +/- 20 for U and 80 +/- 10 for Th. The method is sufficiently sensitive to detect, in a 100-ml sample, less than 1 and 6 micrograms/l. of 232Th and 238U, respectively.
通过中子活化法对天然铀和钍进行尿液分析。铀的回收率（±1σ）为80±20%，钍的回收率为80±10%。该方法灵敏度足够高，在100毫升样品中，分别能检测到低于1微克/升和6微克/升的232钍和238铀。
