排序方式: 共有1条查询结果,搜索用时 15 毫秒
1
1.
Alexander W. R. Shimmield T. M. 《Journal of Radioanalytical and Nuclear Chemistry》1990,145(4):301-310
A microwave oven was utilised to decompose several geological materials by means of acid digestion. Dissolution was achieved in 5 min and238U,234U,232Th and230Th were all determined on the solutions by radiochemical separation and -spectrometry. The materials, which include a granite, an arkose, a river sediment and a nearshore marine sediment, display a large range in U and Th contents /Th/U ratio of 0.7 to 7: U content of 12 to 1400 Bq kg–1/ and activity ratios /234U/238U of 0.95 to 1.50/. The data indicate that the microwave oven dissolution method produces data comparable to the traditional /open beaker/ method. Unit costs are, however, significantly reduced. 相似文献
1