使用离子流动性和理论计算来识别和表征奇拉维生素C
Ying Zou1, Manli Zhang1, Dongdong Zhou1
1Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, Zhejiang, China.
Analytical and bioanalytical chemistry
|April 7, 2025
概括
离子移动性质谱法 (IM-MS) 通过使用三元复合体有效地分离维生素C (L-亚酸) 和其二元异构体 (D-异酸). 这种方法在各种样本中提供了准确的性同位素识别和量化.
科学领域:
- 分析化学 分析化学
- 生物化学 生物化学
- 分离科学 分离科学
背景情况:
- 维生素C (L-亚斯科布酸,L-AA) 是必不可少的,但它的二聚体异构体,D-亚斯科布酸 (D-IAA),具有显著较低的生物活性.
- 准确识别和量化这些异构体对于质量控制和疗效评估至关重要.
研究的目的:
- 开发一种简单直接的离子移动性质谱法 (IM-MS) 方法,用于区分和量化L-AA和D-IAA同位素.
- 阐明控制分离机制的分子相互作用.
主要方法:
- 在酸同位素,-环极 (γ-CD) 和离子 (Cs+) 之间形成三元复合体.
- 使用离子流动性质谱法 (IM-MS) 在离子漂移管中分离这些复合物.
- 计算分析以确定最佳的复杂构造,并了解分离原理.
主要成果:
- 实现了L-AA和D-IAA三元复合物的高分辨率 (Rpp = 1.398) 分离.
- 通过理论计算确定了L-AA和D-IAA复合体之间的明显结构差异.
- 建立了具有良好的线性性和灵敏性的定量分析.
结论:
- 开发的IM-MS方法提供了一种可靠的方法来识别和量化 Askorbic 酸 diastereoisomers.
- 这项研究提供了分子层面的洞察力,了解了奇拉性异构体的分离机制.
- 该方法在制药和水果样本上的成功应用证明了其实用性的实用性.
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