氨基酸LC-MS分析的衍生剂:核心结构和功能组的影响
Tereza Hofmanova1, Rudolf Andrys2, Miroslav Lisa1
1Department of Chemistry, Faculty of Science, University of Hradec Kralove, Rokitanskeho 62, 50003, Hradec Kralove, Czech Republic.
Analytical and bioanalytical chemistry
|February 10, 2026
概括
在生物样本中进行准确的氨基酸分析是很困难的. 研究人员开发了一种稳定有效的衍生剂6-CiQ-NHS,用于通过液态染色体质谱法 (LC-MS) 改进检测和量化.
科学领域:
- 分析化学 分析化学
- 生物化学 生化学
- 质谱测量质量谱测量
背景情况:
- 生物样本中的氨基酸分析面临着由于高极性,低电离效率和缺乏染色体的挑战.
- 导化对于通过LC-UV或LC-MS等技术增强氨基酸的保留,敏感性和检测至关重要.
研究的目的:
- 系统地评估基于二烯,二烯和异二烯的衍生剂,具有各种活性组 (COCl,SO2Cl,NHS) 的支架.
- 确定一种优质的衍生剂,以改善生物样本中的氨基酸量化.
主要方法:
- 使用标记氨基酸的衍生剂的评估,以评估稳定性,效率,色谱和MS反应.
- 液体染色学-质谱学 (LC-MS) 分析以确定线性,检测极限和异构氨基酸的分离.
主要成果:
- 与较不稳定的碳化和硫化剂不同,NHS以基为基础的药物表现出优越的稳定性 (>1年).
- 鉴定出异oline-6-carboxylic acid NHS ester (6-CiQ-NHS) 是最有效的药物,提供快速衍生,强烈的MS信号和稳定性.
- 使用6-CiQ-NHS的LC-MS分析显示出优异的线性 (R2 ≥0.995),低的纳米分子检测极限 (0.23-6.33nM),以及异构氨基酸的成功分离.
结论:
- 6-CiQ-NHS是一种实用且有效的氨基酸量化衍生剂.
- 该研究为用于氨基酸分析的新型衍生剂的合理设计提供了框架.
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