一种便携式微等离子光学发射光谱仪器,具有在线消化功能,用于现场和生物样本中的敏感测定
Ji-Ying Cai1, Xiao Zhang1, Yu-Jia Wei1
1Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang 110819, China.
Analytical chemistry
|February 19, 2024
概括
一个新的便携式设备可以快速地在现场检测生物样本中的 (Pb),使用点放电微等离子体光学发射光谱学. 这种方法为环境健康风险评估提供了灵敏而准确的选.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 频谱学是一种光谱学.
背景情况:
- 在生物样本中准确检测 (Pb) 对于评估污染对人类健康的风险至关重要.
- 传统的方法很庞大,需要大量的样本准备,不适合现场分析.
研究的目的:
- 开发一个便携式的点放电 (PD) 微等离子体光学发射光谱 (OES) 装置,用于在生物样本中进行敏感的现场测定.
- 整合在线消化功能,以简化样本处理.
主要方法:
- 设计了一个带有集成在线消化模块的便携式PD-microplasma-OES设备.
- 样品经过使用HNO3和H2O2的快速消化,然后通过化物生成 (HG) 进行转化.
- 通过在微中通过激发和排放检测到,使用专门的采样柱.
主要成果:
- 在线消化六个50毫克的样品在25分钟内达到97%的效率.
- 对Pb的检测极限为0.018毫克/公斤-1,精度为3.6%.
- 该设备是紧的 (2.5公斤),低功率 (24.3瓦),适合现场使用,经过认证的参考材料和真实样本的验证.
结论:
- 开发的便携式PD-microplasma-OES设备为在生物矩阵中对等有毒元素的现场分析提供了方便和高效的工具.
- 这项技术有助于在环境和人类健康研究中快速评估污染的风险.
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