摘要
建立了精氨酸、赖氨酸、丝氨酸、缬氨酸、亮氨酸等15种氨基酸的气相色谱-质谱联用(GC-MS)检测方法。以硅烷化试剂N-甲基-N-(三甲基硅烷)三氟乙酰胺(MSTFA)为衍生化试剂对氨基酸进行衍生化,在优化的色谱-质谱条件下,15种氨基酸均达到基线分离。结合混合阳离子(MCX)固相萃取柱对氨基酸发酵液实际样品进行净化,将所建立的方法用于^(15)N标记精氨酸发酵液中的氨基酸组成(包括亮氨酸-^(15)N、脯氨酸-^(15)N、精氨酸-^(15)N_4、谷氨酰胺-^(15)N和赖氨酸-^(15)N_2)分析,并根据EI图谱的离子碎片信息对^(15)N标记精氨酸发酵液中的氨基酸同位素丰度进行计算。
A method for the determination of arginine,lysine,serine,valine and other eleven amino acids was developed by MSTFA derivatization combined with gas chromatography-mass spectrometry(GC-MS),and fifteen amino acids reached the baseline separation.The arginine fermentation broth was purified by cationic exchange mixed-solid phase extraction(SPE), and then detected successfully by the developed method.Finally the 15N isotope abundance was calculated by characteristic fragment.
出处
《分析测试学报》
CAS
CSCD
北大核心
2016年第9期1132-1136,共5页
Journal of Instrumental Analysis
基金
科技部"十二五"支撑计划项目(2015BAK45B-20)
上海市科委标准专项(15DZ0504701)
上海市科委地方攻关计划项目(14DZ0511800)