李紅麗副教授、David Chen教授課題組在CARBOHYDRATE POLYMERS發(fā)表研究論文
Combining online size exclusion chromatography and electrospray ionization mass spectrometry to characterize plant polysaccharides
Jiang, Q (Jiang, Qing)[ 1 ] ; Wang, Y (Wang, Ying)[ 1 ] ; Li, HL (Li, Hongli)[ 1 ]*（李紅麗）; Chen, DDY (Chen, David D. Y.)[ 1,2 ]*
[ 1 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab Biomed Mat, Nanjing 210023, Peoples R China
[ 2 ] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada
CARBOHYDRATE POLYMERS，202010,246,116591
Characterizing polysaccharides with large molecular weights and isomeric heterogeneity with mass spectro-metry (MS) is generally difficult. In this work, we demonstrate how coupling size exclusion chromatography (SEC) and high-resolution MS with source-induced dissociation (SID) can be used for the separation and direct structural evaluation of intact polysaccharides. The analytical method was successfully developed using dextran standards up to 3755 kDa. This method was used to separate naturally occurring plant polysaccharides based on size, after which numerous polysaccharide fragments were identified from the resulting MS spectra. The results provided strong evidence for structural diversity, complexity, and heterogeneity among polysaccharides. MS showed superior sensitivity and reliability for the polysaccharides in eluted fractions when compared to a re-fractive index detector. Putative compositions for the fragments were proposed based on exact mass values. The work demonstrated that SEC-SID-MS is a feasible alternative for obtaining valuable structural information from the analysis of intact polysaccharides.
文章鏈接：
https://www.sciencedirect.com/science/article/pii/S0144861720307657?via%3Dihub
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