通过在线同位素稀释激光除-诱导合的等离子体质谱法对固体样本中的微量元素进行定量成像
Kayo Yanagisawa1, Makoto Matsueda1,2, Makoto Furukawa1,3
1Faculty of Symbiotic Systems Science, Cluster of Science and Technology, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan. s015@ipc.fukushima-u.ac.jp.
The Analyst
|August 15, 2023
概括
一种新的在线同位素稀释 (ID) 激光除-诱导合等离子体质谱法 (LA-ICP-MS) 方法准确量化固体中的微量元素. 这种技术纠正了传输效率,使生物组织中精确的元素成像成为可能.
科学领域:
- 分析化学 分析化学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 精确的微量元素的定量可视化对于各种科学学科至关重要.
- 传统方法通常需要矩阵匹配的认证参考材料 (CRM),这限制了它们的适用性.
- 激光切除-诱导合等离子体质谱法 (LA-ICP-MS) 是一种强大的元素分析技术,但需要强大的量化策略.
研究的目的:
- 开发和验证在线同位素稀释 (ID) LA-ICP-MS方法,用于在没有矩阵匹配CRM的情况下准确量化微量元素.
- 研究并将气流的传输效率 (TE) 纳入量化计算中.
- 证明该方法在各种固体样本 (包括生物组织) 中用于定量元素成像的适用性.
主要方法:
- 建立了一个在线ID-LA-ICP-MS系统,将样本气溶与同位素丰富的尖端溶液混合在双端口喷雾室中.
- 确定了两个气溶流到ICP-MS探测器的传输效率 (TE).
- 通过对TEs的比率进行校正进行了量化,并使用五个CRM (SRM 610,612,614,SS-356,SS-383) 验证了该方法.
主要成果:
- 开发的方法准确量化了CRM中的Fe和Sr,结果与认证值一致 (Fe: 92.7-104.7%,Sr: 92.8-109.0%).
- 实现了低检测极限 (LOD):Fe的0.54μggg-1和Sr (3σ) 的0.17μggg-1.
- 在生物硬组织 (老鼠刺刀,人类牙,鱼耳石) 上成功展示了定量元素成像,产生了与湿化学分析一致的结果.
结论:
- 在线ID-LA-ICP-MS方法提供了固体样本中微量元素的准确和可靠的定量可视化.
- 整合传输效率校正提高了量化准确性,消除了对矩阵匹配CRM的需求.
- 该技术适用于各种固体矩阵,包括生物样本,用于高分辨率元素映射.
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