The assay of pterostilbene in spiked matrices by liquid chromatography tandem mass spectrometry and isotope dilution method
作者:Fabio Mazzotti、Leonardo Di Donna、Hicham Benabdelkamel、Bartolo Gabriele、Anna Napoli、Giovanni Sindona
DOI:10.1002/jms.1718
日期:——
Pterostilbene (trans-3,5-dimethoxy-4-hydroxystilbene) is an active component found in several plant species, exhibiting important pharmacological properties. A new and reliable method of assaying this phyto compound in various matrices is presented; the assay is based on (1) the selectivity of liquid chromatography (LC) hyphenated with electrospray ionisation (ESI), (2) the specificity of a two-step mass spectrometric analysis (MS/MS) and (3) the accuracy of the isotope dilution method. The labelled analogue may be conveniently synthesised in a few steps. The sensitivity of the method is confirmed by the very low limit of detection (LOD) and limit of quantitation (LOQ) values achieved in the assay of pterostilbene in two distinct fortified matrices, and is further supported by the observed accuracy values. Copyright © 2010 John Wiley & Sons, Ltd.
芪硫酸酯(反式-3,5-二甲氧基-4-羟基芪)是在几种植物物种中发现的活性成分,具有重要的药理特性。本文介绍了一种新颖可靠的方法,用于测定不同基质中的这种植物化合物;该方法基于(1)液相色谱(LC)与电喷雾电离(ESI)的选择性联用,(2)两步质谱分析(MS/MS)的特异性,以及(3)同位素稀释法的准确性。标记类似物可通过几个步骤方便地合成。方法的灵敏度由在两种不同强化基质中测定芪硫酸酯时达到的极低检测限(LOD)和定量限(LOQ)值确认,并进一步得到观测准确度值的支持。版权所有 © 2010 约翰威立父子有限公司。