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Updated: Sep 15, 2025

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提高微量元素测量准确度:清洁 lysimeter 和物质效应的影响

Salani U Fernando¹, Lakshman W Galagedara¹, Manokararajah Krishnapillai¹

¹School of Science and the Environment, Memorial University of Newfoundland, Corner Brook, Newfoundland, Canada.

Journal of environmental quality

|July 18, 2025

概括

优化的清洁方案显著减少了来自Rhizon和尼龙溶解仪的微量元素 (TE) 污染. 然而,SiC溶解仪始终释放高度的TE,影响土壤溶液分析的准确性.

科学领域:

环境科学环境科学
土壤科学土壤科学
分析化学分析化学

背景情况:

溶解仪对于土壤溶液收集至关重要,但物质相互作用可以引入微量元素 (TE) 错误.
精确的 TE 分析需要尽量减少 lysimeter 诱导的污染.

研究的目的:

开发和评估用于常见张力溶解仪的优化清洁方案.
评估Rhizon MOM,SPE20尼龙和SiC20溶解仪的微量元素吸附和释放特性.

主要方法:

溶解仪经历了酸和超纯水 (UPW) 的连续冲洗,随后是UPW浸泡和超声波.
使用清洗前和清洗后的土壤浸液评估了 TE 的吸附和释放.
用标准实验室技术分析了 lysimeter空白中的 TE度.

主要成果:

优化清洁迅速减少了Rhizon和尼龙溶解仪中的残留TE.
清洗后的子和尼龙溶解仪显示了低的TE空白 (1-100 ng L-1),除了Al,Fe,Zn,Tl和Th.
C溶解仪释放了高度的多种TEs (例如,Al,V,Fe,Ni,Zn,Sr>1μg L-1),并对许多TEs表现出显著的吸附/释放.

结论:

有效的清洁方案对于使用Rhizon和尼龙溶解仪进行精确的TE分析至关重要.
由于固有的释放问题,SiC lysimeter不适合需要低TE检测极限的研究.
研究人员必须根据具体的研究目标和所需的检测极限选择溶解计和清洗方法.

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