一个简单的LC-MS/MS替代用于地下水中的监测:验证和现场应用
Tomás M Mac Loughlin1, Daiana D Dell' Arciprete2, C Felipe Herrera Niño2
1Centro de Investigaciones del Medio Ambiente (CIM), FCEx-UNLP-CONICET, La Plata, Buenos Aires, Argentina. tomasmaclgh@quimica.unlp.edu.ar.
Analytical and bioanalytical chemistry
|March 6, 2026
概括
一种新的液态色谱-并联质谱法 (LC-MS/MS) 方法简化了地下水中无机的监测. 这种可访问的技术为资源有限的地区提供了切实可行的替代方案,改善了公共卫生监测.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 公共卫生 公共卫生
背景情况:
- 在地下水中监测无机是至关重要的,但具有挑战性,尤其是在先进的分析仪器稀缺的地方.
- 现有的方法往往需要复杂的样本准备或衍生,限制了它们在日常环境监测中的适用性.
- 液体染色学-双重质谱仪 (LC-MS/MS) 平台广泛使用,但缺乏用于无机分析的标准化方法.
研究的目的:
- 开发和验证一种简单的,没有衍生性的LC-MS/MS方法,用于地下水中总无机.
- 为资源有限的环境中分散的监控程序提供实用的分析替代方案.
- 为了使污染地下水的可访问,高通量监测.
主要方法:
- 开发了一种方法,该方法涉及短时间的氧化转化,将 (III) 转化为 (V).
- 在常规的C18柱上使用了4分钟的同位素运行,具有共同的移动相 (甲醇:水10:90与0.1%的酸).
- 最小化样品预处理,只需要酸,过氧化和短时间加热.
主要成果:
- 该方法符合国际验证标准:线性 (R2 ≥ 0.999),LOD 0.08 μg/L,LOQ 0.3 μg/L,精度94-106%,精度<6% RSD.
- 证明了适度的矩阵效应 (+7%) 和稳定的氧化提取物.
- 与ICP-MS对地下水样本分析 (斜率0.88,R2 0.93) 显示出强烈一致,并在阿根廷拉普拉塔州91%的测试井中确定了高含量.
结论:
- 开发的LC-MS/MS方法是一种简单,快速和可靠的工具,用于在地下水中确定无机.
- 它为资源有限的环境监测实验室提供了一种实用且易于使用的分析解决方案.
- 该方法促进了对受影响的地下水的有效监测,支持公共卫生倡议.
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