开发和优化现场便携式X射线光光谱技术,用于异质后金工艺场所
N H Marsay1, S T Wagland1, P Campo1
1Faculty of Engineering and Applied Sciences, Cranfield University, Cranfield, Bedfordshire, UK.
Environmental geochemistry and health
|July 5, 2025
概括
在异质的渣渣和土壤样本中评估便携式X射线光光谱 (pXRF) 预处理方法,发现并非所有步骤都是必不可少的. 优化样本准备可以提高数据收集速度,并降低精确金属分析的成本.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 地质化学 地质化学
背景情况:
- 便携式X射线光 (pXRF) 是一种用于土壤元素分析的快速方法.
- 对于影响pXRF精度的常见预处理技术存在有限的评估.
- 具有工业副产品的异质场所,如基本氧化钢铁制造 (BOS) 渣,存在独特的分析挑战.
研究的目的:
- 评估各种预处理方法对pXRF测量的有效性.
- 为了更准确地比较pXRF结果与诱导合等离子体质谱 (ICP-MS).
- 在复杂矩阵中确定最佳样本准备以进行可靠的元素分析.
主要方法:
- 从一个含有BOS渣和土壤的异质后金场所采集的样本.
- 应用的预处理工艺:选,干燥,研磨,不同的样品容器和点火.
- 将pXRF测量与12个检测到的元素的ICP-MS参考数据进行比较.
主要成果:
- 原始样本为四种元素 (Cr,Fe,Mn,Ca) 提供了定性或定量测量.
- 预处理改善了对六种元素 (Pb,Sr,Cr,Mn,Ca,Fe) 的定量测量.
- 和研磨提高了精度和准确性;干燥和研磨提高了准确性. 有机物质的影响可以忽略不计.
结论:
- 对于高质量的pXRF数据,并非所有常见的预处理步骤都是必要的,特别是焚烧.
- 优化样品准备可以显著提高pXRF金属分析的准确性和精度.
- 减少不必要的预处理步骤可以提高数据收集速度,降低环境和地质化学研究的成本.
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