Volume-optional and low-memory (VOLM) chamber for laser ablation-ICP-MS: application to fiber analyses
Volume-optional and low-memory (VOLM) chamber for laser ablation-ICP-MS: application to fiber analyses
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DOI：
10.1039/b701718a
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发表时间：
2007-05
影响因子：
3.4
通讯作者：
Yongsheng Liu;Zhaochu Hu;Honglin Yuan;Shenghong Hu;H. Cheng
中科院分区：
文献类型：
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作者：
Yongsheng Liu;Zhaochu Hu;Honglin Yuan;Shenghong Hu;H. Cheng
我们报告了一种用于激光烧蚀 ICP-MS 的新型体积可选和低内存 (VOLM) 腔室，其中包括一个活性内部单元和一个外部单元。外部单元有一个气体入口，是一个封闭的设计单元，它可以足够大以容纳所需数量的目标。内槽是一个透明的圆柱体，气体出口固定在其中并与外传输管连接。 VOLM 室具有三个突出的优点：（1）提高灵敏度（分别比标准单元中的单脉冲和连续消融高 3.5-13.0 和 1.1-2.0 倍）； (2)稳定性好（采样位置可重复）； (3) 低细胞相关记忆效应（冲洗时间 1-4 秒）。这些优点意味着 VOLM 室适合在剖面和深度分析方面研究小样品的成分。
We report a new volume-optional and low-memory (VOLM) chamber for laser ablation-ICP-MS, which includes an active inner cell and an external cell. The external cell has a gas inlet and is a closed design cell, which can be large enough to accommodate as many targets as required. The inner cell is a transparent cylinder in which the gas outlet is fixed and connected to the outer transfer tube. The VOLM chamber has three outstanding advantages: (1) improved sensitivity (3.5–13.0- and 1.1–2.0-fold greater than for single-pulse and continuous ablation in a standard cell, respectively); (2) good stability (reproducible sampling positions); and (3) low cell-related memory effects (washout time 1–4 s). These advantages mean that the VOLM chamber is suitable for investigating the compositions of small samples in terms of profile and depth analyses.