title: Isolation of inulin-type oligosaccharides from Chinese traditional medicine: Morinda officinalis How and their characterization using ESI-MS/MS.
abstract: Inulin-type oligosaccharides with different DP were prepared by size-exclusion chromatography and purity of each oligosaccharide was determined by HPLC equipped with cyclodextrin-bond column. The purities of obtained inulin-type oligosaccharides with different DP were more than 98% by one-step process. The DP and molecular weight were obtained through ESI-MS in negative mode. The characterization of the inulin-type oligosaccharides with different DP was studied by MS/MS spectra obtained by collision-induced dissociation of molecular ions ([M-H](-)). When the DP was lower, the fragment ions were formed through cross-ring cleavages of two bonds within the sugar ring and glycosidic cleavages. However, with the increase of DP, the ions resulting from glycosidic cleavages between two sugar residues were predominant.
authors.affiliation: CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, PR China.
authors.forename: Zhenmin
authors.initials: Z
authors.lastname: Yang
authors.forename: Yongtao
authors.initials: Y
authors.lastname: Yi
authors.forename: Chuanchuan
authors.initials: C
authors.lastname: Gao
authors.forename: Dengke
authors.initials: D
authors.lastname: Hou
authors.forename: Jun
authors.initials: J
authors.lastname: Hu
authors.forename: Mingyue
authors.initials: M
authors.lastname: Zhao
mesh_terms: D007444:Inulin / Q000737:chemistry*; D008516:Medicine, Chinese Traditional; D032066:Morinda / Q000033:anatomy & histology / Q000737:chemistry*; D009844:Oligosaccharides / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods*
chemical_list: D009844:Oligosaccharides; D007444:Inulin