一点校准和矩阵匹配概念,用LA-ICP-MS量化木材中的潜在有毒元素
Danielle da Silva Francischini1,2, Marco Aurélio Zezzi Arruda3,4
1Spectrometry, Sample Preparation and Mechanization Group (GEPAM), Institute of Chemistry, University of Campinas, PO Box 6154, Campinas, SP, 13083-970, Brazil.
Analytical and bioanalytical chemistry
|November 4, 2023
概括
这项研究验证了一点校准用于量化木材中使用激光消光ICP-MS的有毒元素. 该方法为环境监测和气候变化研究提供了可靠的替代方案.
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:
- 木材样本可以作为环境变化的生物指标.
- 木材中的潜在毒性元素 (PTEs) 对于监测环境毒性和气候变化至关重要.
- 激光除感应合等离子体质谱法 (LA-ICP-MS) 是固体样本元素分析的强大工具.
研究的目的:
- 评估两种定量方法 (分析曲线和一点校准) 用于对木材中PTE的LA-ICP-MS分析.
- 为了评估矩阵匹配的有效性,使用Pinus taeda进行标准制备.
- 确定这些方法对环境监测的适用性.
主要方法:
- 对LA-ICP-MS.应用了外部校准策略 (分析曲线和一点校准).
- 准备了Pinus taeda的标准颗粒,含有不同度的 (Pb), (Cd) 和 (Ba).
- 针对Pb,Cd和Ba的特定同位素,优化了LA-ICP-MS参数.
主要成果:
- 这两种校准策略均从经过认证的参考材料中产生了74-110%的分析回收率.
- 来自LA-ICP-MS的结果通常与ICP-MS对消化木材样本的分析一致.
- 一点校准策略被证明适用于木材样本中PTE的量化.
结论:
- 一点校准是使用LA-ICP-MS在木材样本中量化PTE的可行和有效方法.
- 与Pinus taeda的矩阵匹配对于准备木材分析标准是有效的.
- 这些方法支持用于毒性和气候变化监测的环境分析.
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