A method is described for mass spectrometric analysis of a sample comprising phenolic OH, such as a steroid comprising a phenolic OH, using a quaternary amino oxy Cookson (QAOC) reagent. The QAOC reagent can improve ionization and fragmentation properties of phenolic OH samples, which can thereby improve quantitation and identification. The method can include derivatizing the phenolic OH sample with the QAOC reagent to create an adduct and analyzing the adduct using mass spectrometry. Derivatization of the sample can be a one-step reaction where the QAOC reagent comprises an aminooxy MS tag or can be a multi-step reaction, where the adduct is formed by the reaction of carbonyl substituted PTAD based reagent and the sample followed by combination with an aminooxy MS tag. The sample can also be enriched prior to reacting it with the reagent. The method can also allow for multiplexing.
本文介绍了一种用四元
氨氧基库克森(QAOC)试剂对含
酚羟基的样品进行质谱分析的方法,例如含有
酚羟基的类
固醇。 QAOC试剂可以改善
酚羟基样品的电离和碎片化特性,从而提高定量和鉴定能力。该方法可以包括使用QAOC试剂
对酚羟基样品进行衍生化以创建一个加合物,并使用质谱分析对加合物进行分析。样品的衍生化可以是一步反应,其中QAOC试剂包含
氨氧基MS标记,也可以是多步反应,其中加合物是由含有碳酰基取代的
PTAD试剂与样品反应后与
氨氧基MS标记结合形成的。在对样品进行反应之前,还可以对其进行富集。该方法还可以允许多重复分析。