Fig. 4
Characterisation of oligosaccharides in SEC fraction Ms10_55. a DASH capillary electropherograms showing four unknown oligosaccharides N6, N7, N8 and N9. b MALDI-ToF–MS of the 2-AA labelled oligosaccharides, showing a major sodiated and doubly sodiated ion corresponding to Pent5 (m/z 822.0, m/z 844.0, respectively) and a minor ion corresponding to Pent6 (m/z 954.0 and 976.0, respectively). c HILIC separation of structural isomers of m/z 822.0 [M + Na]+ followed by off-line-MALDI-ToF–MS, results in the EIC showing three structural isomers Z1, Z2 and Z3, respectively