Challenges in the identification process of phenidate analogues in LC-ESI-MS/MS analysis: Information enhancement by derivatization with isobutyl chloroformate
作者:Tamar Shamai Yamin、Hagit Prihed、Avi Weissberg
DOI:10.1002/jms.4327
日期:2019.3
A new analytical technique for the structural elucidation of four representative phenidate analogues possessing a secondary amine residue, which leads to a major/single amine‐representative fragment/product ion at m/z 84 both in their GC‐EI‐MS and LC‐ESI‐MS/MS spectra, making their identification ambiguous, was developed. The method is based on “in vial” chemical derivatization with isobutyl chloroformate
一种新的分析技术,用于结构解析具有仲胺残基的四个代表性酚盐类似物,从而在其GC-EI-MS和LC-ESI中均导致m / z 84处的主要/单个胺代表片段/产物离子‐开发了MS / MS质谱图,使其无法确定。该方法基于在水溶液和有机溶液中用氯甲酸异丁酯在“小瓶中”进行化学衍生,然后进行液相色谱-电喷雾电离质谱(LC-ESI-MS / MS)。所得的氨基甲酸酯衍生物促进了分子结构中所有亚结构的完全覆盖的丰富的片段化模式,从而能够进行详细的结构阐明和低ng / mL水平的原始化合物的明确鉴定。