综合并行光束WDS/EDS分析:地质科学研究的好处和局限性
Giancarlo Capitani1, Roberto Conconi1,2, Niccolò Magnani1
1Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 4, Milano 20126, Italy.
概括
这项研究将波长分散/能量分散微分析与传统电子微探测器进行比较. 能量分散光谱技术为矿物质提供了更快,更温和的分析,没有峰值重叠.
科学领域:
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 场辐射扫描电子显微镜 (FESEM) 与平行光束波长分散/能量分散 (WDE/EDS) 微分析集成,提供先进的分析能力.
- 传统的电子微探测器 (EMP) 分析是确定元素组成的成熟技术.
研究的目的:
- 为了比较一个集成的WDE/EDS微分析系统与传统EMP的性能.
- 在相似的操作条件下评估每个技术的优点和局限性.
主要方法:
- 两种分析系统都使用了相同的参考样本.
- 在进行比较分析时尽可能保持一致的操作参数.
- 在已知成分的矿物标准上进行元素分析.
主要成果:
- 集成的WDE/EDS系统产生了内部一致的结果.
- 对于缺乏光谱重叠的主要元素,波长分散光谱 (WDS) 与能量分散光谱 (EDS) 没有明显的优势.
- 由于并发的光谱采集和每原子较低的电子剂量,EDS表现出更快,更温和的分析,有利于矿物质分析.
- 在所有情况下都观察到显著的元素迁移,特别是在单价,大离子半径元素 (K,Na) 中.
结论:
- 集成的WDE/EDS系统提供可靠的微分析,而EDS在速度和样品保存方面特别有前途.
- 仔细考虑潜在的元素迁移对于准确的定量分析至关重要,特别是对于元素.
- 该研究强调了WDS和EDS在微分析应用中的互补性质和特定优势.
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