用甲作为ICP-MS的反应气体对土壤和植物消化物的硫的分析
Sukhjeet Singh1, Michael R Mucalo2, Megan N C Grainger2
1School of Science, The University of Waikato, Hamilton, New Zealand; Hill Laboratories, Hamilton, New Zealand.
Talanta
|September 7, 2024
概括
在ICP-MS分析中的甲气提供了一种新的方法来量化土壤和植物中的硫 (S),减少了对多种仪器的需求. 这种方法提供了与传统技术可比的准确结果.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 硫 (S) 量化对于农业土壤和植物分析至关重要.
- 感应合等离子体质谱 (ICP-MS) 由于干扰而面临硫检测的挑战.
- 目前的方法通常需要两种仪器 (ICP-MS和ICP-光学发射光谱 - OES),增加时间和成本.
研究的目的:
- 使用ICP-MS.探索甲作为硫分析的反应气体.
- 为了在农业样本中提供氧气替代硫量测量.
- 为了评估三重四极ICP-MS与甲的性能,用于硫分析.
主要方法:
- 在ICP-MS中利用甲作为反应气体,形成CH2SH+产物离子.
- 监控的特定质量电荷比率 (m/z 47和49) 用于硫检测.
- 将三重四极ICP-MS与单一四极ICP-MS进行硫分析.
主要成果:
- 实现的方法检测极限 (MDL) 为植物150毫克/公斤-1,土壤53毫克/公斤-1.
- 证明三重四极ICP-MS的表现优于单一四极ICP-MS.
- 结果显示与ICP-OES相比,不到20%的变化,实验室间样本在2个Z-score内.
结论:
- 甲是一种可行的反应气体,用于在农业样本中使用三重四极ICP-MS进行硫分析.
- 这种方法为传统的双仪器方法提供了一个单仪器的替代方案.
- 开发的方法适用于常规分析,满足所需的检测极限和精度.
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