一个基于液体波导毛细体细胞的微流体分析仪,用于海水中酸盐的高灵敏度测定及其应用
Jincheng Zhao1, Zeming Yang2, Dejing Tang1
1State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 511458, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.
Analytica chimica acta
|October 13, 2024
概括
这项研究介绍了一种用于海水中敏感酸盐检测的新型实验室芯片系统. 集成的液体波导毛细管增强了光学检测,为海洋生态分析提供了切实可行的替代方案.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 微流体学 微流体学
背景情况:
- 微流体芯片上的色度分析对于光学检测是常见的.
- 将液体波导毛细管与总内反射相结合,可以提高光路长度,从而提高灵敏度.
- 这种方法尚未应用于用于海水酸盐检测的PMMA芯片.
研究的目的:
- 开发一个芯片上的实验室系统,用于海水中敏感的酸盐检测.
- 将微流体芯片与外部液体波导毛细管细胞集成.
- 应用船舶和海洋样本实验室分析系统.
主要方法:
- 由Teflon AF 2400制成的可拆卸的全内反射毛细血管连接到微流体芯片.
- 该系统使用了内部 (5厘米) 和外部 (20厘米) 液体波导毛细血管细胞.
- 开发了一个在线分析器,用于实时分析海水.
主要成果:
- 该系统实现了59nM (内部细胞) 和8nM (外部细胞) 的检测极限.
- 酸盐度的动态检测范围为0到23μM.
- 该系统有效地减少了流浪光干扰,并消除了微通道表面处理的需要.
结论:
- 开发的方法为检测酸盐度的微小变化提供了高灵敏度.
- 该系统为微流体系统中的高时空分辨率酸盐测定提供了实用且具有成本效益的替代方案.
- 相关性分析揭示了海洋生态特征,证明了该方法在环境监测中的实用性.
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