Determination of fatty acids from mushrooms using high performance liquid chromatography with fluorescence detection and online mass spectrometry

景年华、史俊友、李国梁、孙志伟、尤进茂*Determination of fatty acids from mushrooms using high performance liquid chromatography with fluorescence detection and online mass spectrometry,Food Research International.2012,48(1):155-163.IF=3.150

Abstract:Owing to the growing consumer interest in low-fat foods, it is necessary to provide our customers with the information about the fatty acid composition of mushrooms. In this study, a selective and sensitive method based on pre-column derivatization using 2-(12-oxobenzo[b]-acridin-5(12H)-yl)-ethyl-4-toluenesulfonate(BAETS) as the labeling reagent has been optimized by high-performance liquid chromatography with fluorescence detection and online mass spectrometry identification (HPLC–FLD–MS/MS). Fatty acids (FA) were derivatized by BAETS and separated on a reversed-phase Hypersil BDS C8 column with a gradient elution.Eighteen FA investigated were found to give excellent linear responses with correlation coefficients of>0.9996. Limits of detection and quantification (LOD and LOQ) were in the range of 0.46 to 1.02 ng mL−1and 1.43 to 3.48 ng mL−1, respectively. This method was applied to the quantitative analysis of FA from a wild and four cultivated mushroom species. The wild mushroom named Armillaria luteo-virens contained higher unsaturated fatty acids (UFA) when compared to the cultivated species (Flammulina velutiper, Pleurotus eryngii, Copyinds comatus and Agrocybe aegerita). Ratio of UFA:SFA (SFA, saturated fatty acids) for A. luteo-virens was >5 whereas the values for the cultivated species were b4.09. Therefore, BAETS derivatization allowed the development of a highly sensitive and specific method for the determination of FA in mushroom samples.