@misc{oai:repo.qst.go.jp:00069169,
 author = {Liao, Haiqing and Zheng, Jian and Wu, Fengchang and Yamada, Masatoshi and Kusakabe, Masashi and Ｌｉａｏ Ｈａｉｑｉｎｇ and 鄭 建 and 山田 正俊 and 日下部 正志},
 month = {Nov},
 note = {It is important to understand the distribution and fate of Pu in lakes due to their radiation threat and high chemical toxicity, since many lakes are the source of drinking-water. Moreover, studies indicated that Pu is useful for establishing deposition chronology of lakes, which has been commonly studied using 210Pb and 137Cs. However, differing from the analysis of 137Cs, samples must be destroyed during the analysis of Pu. Thus, a precise method with small sample size is always preferable for the determination of Pu in lake sediments.
We report a simple and accurate Pu analytical method using ICP-SF-MS combined with chromatographic separation and purification for the studies of recent aquatic sedimentation. An anion exchange resin (AG MP-1M) was used to purify Pu isotopes. The chemical yield was ca. 64 %. For SRM4354, Pu activity of 3.90 mBq/g agrees well with the certified value. However, the mean 240Pu/239Pu atom ratio of 0.144 was lower than those reported by other laboratories. Considering the fact that those reported values were different from each other, our results suggest that this material may be isotopically inhomogeneous. The developed analytical method was applied to analyze Pu isotopes in sediment samples of Lake Poyang, East China., 日本放射線影響学会第50回大会},
 title = {Determination of plutonium isotopes in freshwater lake sediments by ICP-SF-MS after separation using ion-exchange chromatography},
 year = {2007}
}