Strategy for the Isolation, Derivatization, Chromatographic Separation, and Detection of Carnitine and Acylcarnitines
作者:Paul E. Minkler、Stephen T. Ingalls、Charles L. Hoppel
DOI:10.1021/ac0487810
日期:2005.3.1
ion-exchange/reversed-phase chromatography using a single non-end-capped C8 column, and (4) detection of carnitine and acylcarnitine pentafluorophenacyl esters using an ion trap mass spectrometer. Recovery of carnitine and acylcarnitines from the isolation procedure is 77-85%. Derivatization is rapid and complete with no evidence of acylcarnitine hydrolysis. Sequential ion-exchange/reversed-phase HPLC results
介绍了一种检测肉碱和酰基肉碱的策略。该通用系统具有四个组成部分:(1)通过蛋白质沉淀/脱盐和阳离子交换固相萃取进行分离,(2)肉碱和酰基肉碱用五氟苯甲酰基三氟甲磺酸酯的衍生化,(3)顺序离子交换/反相色谱,使用单个未封端的C8色谱柱,以及(4)使用离子阱质谱仪检测肉碱和酰基肉碱五氟苯甲酸酯。从分离过程中回收的肉碱和酰基肉碱为77-85%。衍生化迅速且完全,没有酰基肉碱水解的迹象。顺序离子交换/反相HPLC可分离衍生自肉碱和酰基肉碱的试剂副产物,然后反相分离肉碱和酰基肉碱五氟苯甲酸酯。MS / MS的检测具有高度选择性,其中肉碱五氟苯甲酸酯在m / z 311处产生强的产物离子,酰基肉碱五氟苯甲酸酯碎片产生两个产物离子:(1)m / z 59的损失和(2)离子的产生在m / z 293上进行分析。为证明该分析策略,将磷酸缓冲的血清白蛋白掺入了肉碱和15种酰基肉碱,并使用上述蛋白沉淀/脱盐和阳