使用不同的技术确定
S Vinter1, J Filip1, J Sotolarova2
1Department of Environmental Protection Engineering, Tomas Bata University in Zlin, Faculty of Technology, Vavreckova 275, 760 01, Zlin, Czech Republic.
Talanta
|November 20, 2025
概括
电压测量为的物种化提供了一种具有成本效益的方法,为检测物种提供了比原子吸收光谱更高的灵敏度. 这种技术对于分析复杂样本中的具有价值.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 伏特度测量方法为测定的光谱技术提供了经济有效的替代方案.
- 原子吸收光谱 (AAS) 通常测量总,而电压测量可以确定特定的物种,如Se.
- 结合AAS和电压测量,可以进行全面的物种分析.
研究的目的:
- 为了比较火焰原子吸收光谱 (FAAS) 和石墨炉原子吸收光谱 (GFAAS) 的分析性能,使用阳极剥离方波电压测量 (ASSWV).
- 为了评估未经修改的玻璃碳电极 (GCE) 和笔石墨电极对特异性的有效性.
- 在模型溶液和真实样本中确定单个物种 (Se(IV,Se(VI)).
主要方法:
- 对FAAS,GFAAS和ASSWV技术进行比较.
- 使用未经修改的玻璃碳电极 (GCE) 和笔石墨电极用于电压测量.
- 使用库存溶液和模型样本对Se(IV),Se(VI) 和Se(0) 的量化.
主要成果:
- GFAAS显示了最低的检测极限 (5.2μg/L),其次是ASSWV (0.57 mg/L Se(IV)) 和FAAS (0.896 mg/L).
- 带有GCE的ASSWV显示在1.2-9.7 mg/L范围内对Se(IV) 进行线性校准.
- 对于危险废物液 (33-37毫克/升) 中的总测定,FAAS更可靠,而电压测量量量为4.9-6毫克/升 (14.9-17%的总).
结论:
- 电压测量是复杂矩阵中物种化的可行和选择性方法,补充了光谱方法.
- 基于石墨的电极为的测定提供了更高的灵敏度,但需要几何稳定性.
- 这项研究表明,将光谱和电压测量技术结合起来,对于精确的物种化具有实用性.
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