A derivatization procedure for the simultaneous analysis of iminosugars and other low molecular weight carbohydrates by GC–MS in mulberry (Morus sp.)
作者:S. Rodríguez-Sánchez、O. Hernández-Hernández、A.I. Ruiz-Matute、M.L. Sanz
DOI:10.1016/j.foodchem.2010.10.097
日期:2011.5
iminosugars such as deoxynojirimycin (DNJ) or fagomine and other carbohydrates of low molecular weight by gas chromatography coupled to mass spectrometry (GC–MS) in Morus sp. Both oximation + trimethylsilylation and oximation + acetylation allowed the separation of target compounds, whereas trimethylsilyl (TMS) and acetylated derivatives showed several coelutions. Nevertheless, oximation + acetylation were
不同的衍生化过程中测定同时分析的亚氨基糖如脱氧野尻霉素(DNJ)或桑叶生物碱和低分子量的其它碳水化合物通过气相色谱法在耦合到质谱法(GC-MS)桑属。肟化+三甲基甲硅烷基化和肟化+乙酰化均可分离目标化合物,而三甲基甲硅烷基(TMS)和乙酰化衍生物则表现出几种共洗脱。然而,由于酮糖的不完全衍生化,由于给出的酮糖结果不准确,因此放弃了肟化+乙酰化。分析了转化为三甲基甲硅烷基肟(TMSO)的不同条件,使用六甲基二硅氮烷与三氟乙酸作为甲硅烷基化剂可获得最佳结果。亚氨基糖(DNJ,桑叶生物碱和哌可酸的衍生物)和其它碳水化合物如单糖和二糖的含量,肌醇和肌醇半乳糖苷的异构体在桑树提取物(水果,树叶和树枝)通过使用TMSO过程GC-MS来确定。