萃取色层-微沉淀法测量放射性污染土壤中的钚  

Determination of Plutonium in Contaminative Waste Soil Using TEVA Resin Microlayer-micro Precipitation System

作　　者：陈静[1] 魏璐[1] 靳小军[1] 韩雪梅[1] 

机构地区：[1]中核四0四有限公司第二分公司,甘肃兰州732850

出　　处：《广州化工》2017年第12期123-125,167,共4页GuangZhou Chemical Industry

摘　　要：建立了快速分离测量放射性污染土壤中钚的方法。1.0 g土壤样品经高压消解后,以3.0 mol/L HNO_3转出,加入Al(NO_3)3掩蔽溶液中的PO_3-4及F-;通过TEVA树脂微色层柱吸附溶液中的钚,用洗脱液将钚洗脱。洗脱液中的钚(Ⅳ)用氨基磺酸亚铁还原为钚(Ⅲ),经氟化铈微沉淀制源,于α能谱分析测定。结果表明,当样品量为1 g时,相对标准偏差小于10%,重加回收率大于92%,方法的检测下限为6.4 Bq/kg,满足了核设施退役治理项目中放射性污染土壤的快速分析要求。A rapid separation method for the determination of plutonium in radioactive contaminated soilswas established. 1.0 g soil sample dissolved by high pressure digestion was turned out with 3.0 mol/L HNO3, adding AI（ NO3 ）. The solution pass through TEVA resin micro extraction chromatography to absorb Pu （Ⅳ） after Pu was adjusted to Pu（Ⅳ） and then Pu（Ⅳ）was eluted by 0. 02 moL/L HCl-0. 02 mol/L HF. Pu（ IV ） in the eluent was reduced to Pu（Ⅲ） with Fe （NH2 SO4 ）2 for preparing the source of Pu by micro：precipitation system and in the following to be measured on the αalpha spectroscopy. The results showed that the standard deviation was less than 10% and additional recovery of the method was greater than 92%. The minimum detectable concentration was 6. 4 Bq/kg when the sample amount was 1 gram. The method met the requirement of the rapid analysis of amount satisfying the requirements of analysis in contaminative waste soil in the decommissioning project of nuclear facilities.

关 键 词：放射性污染土壤 钚 TEVA树脂 微沉淀制源 

分 类 号：O658.11[理学—分析化学]