探索传统HPLC可逆适应以进行毛细血管规模的操作
Edwin Martin Cardenas Contreras1, Elton Tanis1, Fernando Mauro Lanças2
1Nano Separations Technologies, São Carlos, Brazil.
Journal of chromatography. A
|June 19, 2024
概括
这项研究提出了一种具有成本效益的方法,以适应标准的高性能液态染色学 (HPLC) 进行毛细血管规模分析,使用活性流量分割器和一种新型紫外线可见探测器细胞. 这种微型液态色谱系统为分析诸如多环芳的化合物提供了可靠的性能.
科学领域:
- 分析化学 分析化学
- 染色体学 染色体学 是一种染色学.
- 发展工具发展工具
背景情况:
- 传统的高性能液态染色学 (HPLC) 系统通常以更高的流速运行,这对小型化或毛细血管规模分析构成挑战.
- 检测毛细血管流速 (1-10μL/分钟) 的分析物需要专门的细胞来保持灵敏度并最大限度地减少带宽.
- 为了成本效益和可访问性,适应现有的HPLC基础设施用于微尺度应用是理想的.
研究的目的:
- 使用传统的HPLC仪器开发一个可行的毛细血管级液体色谱系统.
- 为微流速设计一个活跃的流量分割器和一个兼容的紫外线可见检测单元.
- 为了验证微型系统的性能,用于分析应用.
主要方法:
- 一个Arduino Uno板被用来控制一个步进电机驱动的分离,自动调节流量以适应毛细血管尺度 (1-10μL/分钟).
- 开发了一种定制的毛细血管紫外线可见检测细胞,体积为14nL,光路长度优化.
- 使用实验室包装的毛细血管LC柱 (0.25毫米x15厘米,3.0微米C18) 和模型化合物 (多环芳) 评估了系统性能.
主要成果:
- 开发的活性流量分割器成功地从标准HPLC中实现了可重现的毛细血管尺度流量.
- 定制的UV-vis电池最大限度地减少了列外带的扩大,并使微流速的敏感检测成为可能.
- 性能评估表明,对于多环芳的理论板,分辨率和最小的带宽都很好.
结论:
- 拟议的系统为小型化液态染色学提供了有利可图,可靠和成本效益的解决方案.
- 这种方法可以使用传统的HPLC仪器进行毛细血管尺度分离,从而扩大分析能力.
- 集成的流量分离器和检测细胞解决了微尺度染色学中的关键挑战,为研究人员提供了一种实用工具.
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