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Carius管直接蒸馏快速分离锇方法的改进

周利敏, 高炳宇, 王礼兵, 李超, 屈文俊, 侯增谦, 杜安道

周利敏, 高炳宇, 王礼兵, 李超, 屈文俊, 侯增谦, 杜安道. Carius管直接蒸馏快速分离锇方法的改进[J]. 岩矿测试, 2012, 31(3): 413-418.
引用本文: 周利敏, 高炳宇, 王礼兵, 李超, 屈文俊, 侯增谦, 杜安道. Carius管直接蒸馏快速分离锇方法的改进[J]. 岩矿测试, 2012, 31(3): 413-418.
ZHOU Li-min, GAO Bing-yu, WANG Li-bing, LI Chao, QU Wen-jun, HOU Zeng-qian, DU An-dao. Improvements on the Separation Method of Osmium by Direct Distillation in Carius Tube[J]. Rock and Mineral Analysis, 2012, 31(3): 413-418.
Citation: ZHOU Li-min, GAO Bing-yu, WANG Li-bing, LI Chao, QU Wen-jun, HOU Zeng-qian, DU An-dao. Improvements on the Separation Method of Osmium by Direct Distillation in Carius Tube[J]. Rock and Mineral Analysis, 2012, 31(3): 413-418.

Carius管直接蒸馏快速分离锇方法的改进

基金项目: 

中国地质科学院基本科研业务费项目(2011CSJ01)

国家自然科学基金重点项目(40730419)

国家自然科学基金项目(40972070)

Improvements on the Separation Method of Osmium by Direct Distillation in Carius Tube

  • 摘要: 蒸馏法是Re-Os同位素测量体系从基质中分离Os的一种快捷方法,但装置繁琐,清洗工作量大,已成为限制其应用的瓶颈。文章对Carius管传统蒸馏装置进行了改进,利用橡胶滴头代替硅胶管和玻璃堵头自制Carius管直接蒸馏接口装置,简化了气体进出口管路,使用电蒸笼代替电热套,对蒸馏时间、样品溶液稀释倍数和吸收液体积等蒸馏条件进行了优化。改进后的装置升温速度、稳定性和简便性得到提高,简化了实验器皿,有利于降低空白,实现在较小操作空间内大批量样品的同时处理。Carius管直接蒸馏实验结果表明,Os的回收率可达86.7%~95.2%。在长时间(2 h)蒸馏条件下, Os回收率比传统蒸馏瓶法高约41%。针对不同样品类型和测试仪器,可选择相应的蒸馏条件,有效压缩了样品处理时间,提高了测量计数。对Re-Os定年标准物质GBW 04436(JDC)测定5次的模式年龄为(139.5±1.9) Ma~(142.0±2.1) Ma,标准物质GBW 04435(HLP)测定2次的模式年龄为(220±3.3) Ma~(223.0±3.2) Ma,分别与标准值(139.6±3.8) Ma和(221.4±5.6) Ma在不确定度范围内一致。改进后的Carius管直接蒸馏装置已应用于日常样品处理。
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出版历程
  • 收稿日期:  2012-03-06
  • 修回日期:  2012-04-10

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