猎探测器:一种高压和坚固的采样接口,用于将无损液体染色体注射与现场纳米升级样品预处理相合
Wei-Xin Ying1, Shao-Wen Shi2, Hui-Feng Wang2
1Institute of Microanalytical Systems, Department of Chemistry, Zhejiang University, Hangzhou 310058, China.
Analytical chemistry
|July 30, 2024
概括
一个新的猎探测器可以使用液态染色体质谱法 (LC-MS) 以最小损失进行痕迹样本分析. 这种创新系统在复杂样本 (包括单细胞) 中实现了高分离效率和蛋白质识别.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 质谱测量质量谱测量
背景情况:
- 微量样本分析是关键的,但由于注射过程中样本损失具有挑战性.
- 现有的液态染色体质谱仪 (LC-MS) 系统在注入微量样本时遇到最小损失的困难.
研究的目的:
- 开发一个集成的分析探头,用于高效的微量样本注射和LC-MS分析.
- 为了克服使用LC-MS的痕迹分析中样本损失的局限性.
主要方法:
- 开发了猎探头,一个现场分析探头,集成样品注射,LC分离和电喷.
- 使用不钢和计算机数控 (CNC) 来制造探头,以获得高机械强度.
- 配合一个纳米升级液滴反应器 (PEEK),可在800bar的移动相压力下运行.
- 使用探针按压微量在位 (PPMI) 注射方法.
主要成果:
- 基于猎探头的LC-MS系统在混合物分析中显示出高分离效率和良好的重复性 (保留时间为1.8%,峰值面积为9.9%的RSD).
- 从200ppg的HeLa蛋白消化剂中成功识别了平均766个蛋白质组.
- 在293个单细胞中确定了241个蛋白质组,显示了单细胞蛋白质组分析的潜力.
结论:
- 猎探测器提供了一个强大的解决方案,用于痕迹样本分析,LC-MS的损失最小.
- 该系统的高效率和灵敏度适用于复杂的生物样本,包括单细胞蛋白质组学.
- 这项技术提升了用于各种科学应用的痕迹分析能力.
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