为AF4-UV-ICP-MS分析解决有机丰富的北极河流中微量元素量化的不确定性
Yu Wang1, Chad W Cuss1,2, Lei Pei1
1Department of Renewable Resources, University of Alberta, Edmonton AB T6G 2H1, Canada.
Analytical chemistry
|April 23, 2024
概括
不对称的流场流量分成 (AF4) 可以导致微量元素的损失和污染. 用苏瓦尼河天然有机物质预先调整AF4系统,可以在复杂的水样中减轻这些物质.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 分离科学 分离科学
背景情况:
- 非对称流场流分化 (AF4) 是一种关键技术,用于分离与水中的合物相关的微量元素 (TE).
- 了解和控制人工物对于使用AF4-UV-ICP-MS在低度下精确测量TE至关重要.
研究的目的:
- 调查北极河水中合物相关的TE的AF4-UV-ICP-MS分析中的潜在人工物.
- 确定 TE 损失和污染的来源,并制定人工物减缓策略.
主要方法:
- 使用AF4-UV-ICP-MS.分析北极河水.
- 对 TE 吸附到非通道表面和膜污染的评估.
- 评估合体驱动的转移和污染物去除.
- 使用苏瓦尼河自然有机物质 (SRNOM) 测试预条件化策略.
主要成果:
- 在非通道表面上吸附Mn,Co,Ni,Cu和Pb导致高达48%的TE损失.
- 从非通道表面观察到Co,Ni,Cu和Pb的交叉污染.
- 不干净的膜引入了Ni和Cu的污染.
- 体可以通过转移引起分析偏差,但也可以去除污染物.
结论:
- 在复杂水域的AF4-UV-ICP-MS分析中,仪器工件,包括TE损失和污染,是重要的.
- 建议使用SRNOM预先调整AF4系统,以减少膜污染和携带.
- 提出了一个全面的策略,以尽量减少仪器工件,以获得精确的TE测量.
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