基于固体样本的快速和同时检测食品中的和,采用集成电热蒸发技术
Hongyu Jia1, Guanyu Lan1, Xue Li1
1Institute of Quality Standard and Testing Technology for Agro-products of Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China.
Food chemistry
|June 25, 2024
概括
这项研究引入了一种新的固体采样-电热蒸发方法,用于同时测定 (Cd) 和 (Hg). 该技术提供快速,准确的食品分析,高精度和最小的样本准备.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 准确地确定像 (Cd) 和 (Hg) 这样的重金属对于食品安全和环境监测至关重要.
- 传统方法通常涉及复杂的样品消化,并且可能耗时.
- 开发快速,敏感和绿色的分析技术是一个持续的挑战.
研究的目的:
- 开发一种创新的固体采样 (SS) 集成电热蒸发 (ETV) 方法,用于同时确定Cd和Hg.
- 为了实现食品样本中Cd和Hg的快速,准确和绿色监测.
- 为了提高分析性能,利用差异化的元素蒸发和运输行为.
主要方法:
- 使用小型N2/H2发电机来减少大气层以帮助Cd蒸发.
- 在催化热解炉 (CPF) 中使用MgO填充剂,以吸收矩阵干扰物并促进Hg和Cd的运输.
- 实施了两阶段的CPF系统,具有选择性捕获 (合金) 和热释放Hg的轮机制,用于与Cd同时检测.
主要成果:
- 在0.4g的样本大小下,达到Cd和Hg (0.02-0.04 ng/g) 的低检测极限.
- 显示出出色的线性 (R2 > 0.998) 和高回收率 (85.0-111.9%).
- 在不需要样本消化过程的情况下,在大约3分钟内完成分析.
结论:
- 开发的SS-ETV方法为快速监测食品中的Cd和Hg提供了一种简单,绿色和安全的方法.
- 该分析仪表现出良好的精度和准确性,使其适合于实际的食品安全应用.
- 差异化的元素行为和优化的捕获机制是同时确定Cd和Hg的关键.
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