• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Conference on Environmental Remediation and Radioactive Waste Management >Ultratrace Determination of Strontium-90 in Environmental Soil Samples from Qatar by Collision/Reaction Cell-Inductively Coupled Plasma Mass Spectrometry (CRC-ICP-MS/MS)
【24h】

Ultratrace Determination of Strontium-90 in Environmental Soil Samples from Qatar by Collision/Reaction Cell-Inductively Coupled Plasma Mass Spectrometry (CRC-ICP-MS/MS)

机译：通过碰撞/反应电感耦合等离子体质谱法（CRC-ICP-MS / MS）从卡塔尔环境土样品中锶-90在环境土样品中的超速度测定

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Because of the very low level of 90Sr in the environmental soil samples and its determination by beta counting may take several weeks, we developed a procedure for ultratrace determination of 90Sr using collision reaction cell-inductively coupled plasma tandem mass spectrometry (CRC-ICP-MS/MS, Agilent 8800). Soil samples were dried at 105 °C and then heated in a furnace at 550 °C to remove any organics present. 500 g of each soil samples were aliquoted into 2000 ml glass beakers. Each Soils samples were soaked in 2 ppm Sr solution carrier to allow determination of chemical yield. The solid to liquid ratio was 1:1. Finally the soil samples were dried at 105 °C. Five hundred milliliters concentrated nitric acid and 250 ml hydrochloric acid volumes were added on 500 g soil samples. The samples were digested on hot plate at 80 °C to prevent spraying with continuous manual mixing. The leachate solution was separated. The solids were rinsed with 500 ml deionized water, warmed on a hot plate and the leachate plus previous leachate were filtered and the total volume was reduced to 500 ml by evaporation. Final leachate volume was transferred to a centrifuge tubes. The centrifuge tubes were centrifuged at 3,500 rpm for 10 min. The leachate was transferred to a 1 L beaker and heated on a hot plate to evaporate the leachate to dryness. The reside was re-dissolved in 100 ml of 2% HNO_3 and reduced by evaporation to 10 mL. The solution was measured directly by CRC-ICP-MS/MS by setting the first quadruple analyzer to m/z 90 and introducing oxygen gas into the reaction cell for elimination isobar interference from zirconium-90. The method was validated by measurements of standard reference materials and applied on environmental soil samples. The overall time requirement for the measurement of strontium-90 by CRC-ICP-MS/MS is 2 days, significantly shorter than any radioanalytical protocol currently available.
机译：由于环境土壤样​​品中的90sR水平，并通过β计数的测定可能需要几周，我们开发了使用碰撞反应电池电感耦合等离子体串联质谱法（CRC-ICP-MS）的超超速度测定的过程（CRC-ICP-MS / MS，Agilent 8800）。将土壤样品在105℃下干燥，然后在550℃下在炉中加热以除去存在的任何有机物。将500克每种土壤样品等分为2000mL玻璃烧杯。将每个土壤样品浸泡在2ppm SR溶液载体中以允许测定化学产率。液体比为1：1。最后将土壤样品在105℃下干燥。在500g土壤样品上加入五百毫升浓缩硝酸和250mL盐酸体积。在80℃下在热板上消化样品，以防止用连续的手动混合喷涂。分离渗滤液溶液。用500ml去离子水冲洗固体，在热板上温热，过滤浸出液并通过蒸发将总体积降至500ml。将最终渗滤液体积转移到离心管中。将离心管以3,500rpm离心10分钟。将浸出液转移到1L烧杯中并在热板上加热以蒸发渗滤液至干。将该存在于100ml 2％HNO_3中重新溶解并通过蒸发降低至10ml。通过将第一四倍分析仪设置为M / Z90并将氧气引入反应细胞中，直接通过CRC-ICP-MS / MS测量溶液，以消除来自锆 - 90的异等物干扰。该方法通过标准参考材料的测量验证并施用于环境土壤样​​品。 CRC-ICP-MS / MS测量锶-90的总时间要求是2天，明显短于目前可用的任何放射性分析方案。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号