Improvements in noble gas separation methodology: A nude cryogenic trap
Improvements in noble gas separation methodology: A nude cryogenic trap
复制标题
稀有气体分离方法的改进：裸低温阱
DOI：
10.1029/2001gc000202
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发表时间：
2001
期刊：
影响因子：
3.7
通讯作者：
D. Lott
中科院分区：
文献类型：
--
作者：
D. Lott
介绍了一种新型惰性气体低温捕集器的设计，采用抛光不锈钢作为活性捕集表面。这种捕集器比木炭捕集器系统提供了显著的优势，现在通常用于制备稀有气体样品进行质谱分析。Ne、Ar、Kr和Xe的等分在低于9 K时被定量捕获并选择性释放（分别在20 K、85 K、110 K、135 K时≥99%）。这些释放温度明显低于传统的木炭捕集器。详细研究了捕集器对单个气体和氖气-氩气混合物的吸附-解吸特性与捕集器温度的关系。与木炭捕集器相比，这些稀有气体的低释放温度和改进的分离将减少处理时间，减少空白和记忆，并提高稀有气体样品制备的纯度。
A new noble gas cryogenic trap design employing polished stainless steel as the active trapping surface is described and tested. This trap offers significant advantages over the charcoal trap systems now commonly used for the preparation of noble gas samples for mass spectrometric analysis. Aliquots of Ne, Ar, Kr, and Xe are quantitatively trapped at less than 9 K and selectively released (≥99% at 20 K, 85 K, 110 K, 135 K, respectively). These release temperatures are significantly lower than obtained with conventional charcoal traps. The sorption‐desorption characteristics of the trap for the individual gases and neon‐argon mixtures are examined in detail as a function of trap temperature. The low release temperatures and improved separation for these noble gases will decrease processing times, reduce blanks and memory, and enhance the purity of noble gas sample preparation as compared to charcoal traps.