A New Method for Rapid Concentration and Determination of ~(224) Ra in Seawater
- 海洋环境－已发表论文 
报道一种快速富集、测定海水中 2 2 4 Ra的新方法 .该法用 Mn O2 -纤维富集 60升海水中 2 2 4 Ra,用 2 2 0 Rn的连续射气闪烁计数法测 2 2 4 Ra的比活度 ,方法简便、快速、灵敏、准确 ,适合于船上等现场操作 ,已成功地应用于九龙江河口区和厦门湾水体中 2 2 4 Ra的分布与地球化学行为的研究 【英文摘要】 A new method for rapid concentration and determination of 224 Ra in seawater was presented. 224 Ra was preconcentrated from seawater by adsorpting onto MnO 2 fiber. The specific activity of 224 Ra adsorpted on the fiber was determined by stripping its daughter, 220 Rn, directly from the fiber bundle by circulating a stream of N 2 through it and measuring the 220 Rn activity concurrenty. This method is simple,sensitive,accurate and suitable for field operations. It was successful...