摘要
本文研究了18种α－氨基酸的快原子轰击质谱，发现添加三氟乙酸溶液能显著提高灵敏度，改善谱图。特征碎片主要有中性丢失CO2H2，H2O2，NH3的离子以及R＋离子。侧链的性质决定了碎片的产生和离子的强弱。
The fast atom bombardment mass spectra of 18 α-amino acids have been studied.From the results one can find that TFA is an excellent auxililary to increase the sensitivity and improve the spectra greatly. The main fragments include [MH-CO2H2]+, [MH-H2O]+,[MH-NH3]+ and R+, the formation and ion intensity of which are determined by the nature of the side chains.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1996年第9期1032-1035,共4页
Chinese Journal of Analytical Chemistry
关键词
氨基酸
快原子轰击
灵敏度
特征碎片
质谱
Amino acid, fast atom bombardment, sensitivity, main fragment
