浸取分离与电感耦合等离子体质谱联用测定壤中活动态铀

Determination of Mobile Uranium in Soil with Leaching Separation and Inductively Coupled Plasma Mass Spectrometry

利用分解能力合适的浸取剂分离提取土壤中活动态铀元素并和电感耦合等离子体质谱(ICP-MS)联用法测定了已知砂岩型铀矿床(松辽盆地钱家店砂岩型铀矿)和未知试验区(松辽盆地某处)上覆土壤及背景区土壤中铀全量及活动态铀含量。结果表明,已知砂岩型铀矿床附近土壤中活动态铀含量异常十分明显,可达到背景值的几十倍,铀总量的异常与背景值的差异较小,只有两倍左右。在未知试验区开展实验的结果也显示了较强的活动态铀含量异常。因此,元素活动态提取技术是寻找隐伏砂岩型铀矿有效的方法。

Samples of two area were determined by using appropriate leaching agent and inductively coupled plasma mass spectrometry(ICP-MS).The total content of uranium and mobile uranium in incumbent soil and background.Qianjiadian sandstone-type U-ore in the Songliao Basin is the known sandstone-type U-ore.And a certain location in the Songliao Basin was selected as an unknown experimental area.And the ICP-MS was used to determine samples.The known area s data show that mobile uranium anomaly is prominent.The contents are dozens of times higher than background value.While the total uranium anomaly is similar to background value.Mobile uranium in the experimental area also has obvious anomalies.Thus,selective leaching of mobile forms is an effective method for sandstone-type U-ore.