未衍生化氨基酸的LC/ESI-MS分析和质谱
LC/ESI-MS analysis of underivatized amino acids and mass spectrum
摘要:
本文报道了非衍生化氨基酸的LC/ESI-MS分析方法,并给出了相应的质谱和裂解模式。通过质谱测定的诊断产物离子可以支持单个氨基酸的定性鉴定和定量估计。因此,使用离子对试剂(即,壬基戊酸,NFPA)可用于评估目标氨基酸和用于氨基酸的进一步化合物特异性氮同位素研究。
英文摘要:
We report the method of LC/ESI-MS analysis of underivatized amino acids with corresponding mass spectrum and fragmentation patterns. Diagnostic product ions determined by mass spectrometry can support the qualitative identification and quantitative estimation of individual amino acids. Therefore, the optimization of chromatographic separation using the ion-pairing reagent (i.e., Nonafluoropentanoic acid, NFPA) is useful for the evaluation of target amino acid and for further compound-specific nitrogen isotope studies of amino acids.
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