摘要
采用大体积现场泵方法同时采集不同粒级的228Th、234Th及溶解态的228Th、234Th、228Ra.以小体积MnO2共沉淀-β计数法测定海水中的总234Th活度(A′TTh);用Goflo采水器采集6~10dm3海水,继而过滤收集颗粒物质并测定其234Th的活度(A′PTh);以α能谱测定分离纯化后的228Th;对228Ra则是采用测定其子体228Ac的β放射性方法.采用此流程分析了南海2004年2月航次A1站位的样品,获得了较好的结果.
Size-fractionated ^228Th, ^234 Th and dissolved ^228 Th, ^234 Th, ^228 Ra were collected with large volume in-situ pump at a station in the northern South China Sea in Feb. , 2004. Total ^234Th was measured by using small-volume technique. Particulate ^234Th was collected by using Go-Flo bottles and measured by β counting. ^228Th was determined by α spectrometry after purification and ^228Ra was determined through β counting for ^228Ac, daughter of ^228Ra. Results are shown at the end of this paper.
出处
《台湾海峡》
CAS
CSCD
北大核心
2006年第3期430-436,共7页
Journal of Oceanography In Taiwan Strait
