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The structural complexity and diversity of oligosaccharides in glycoproteins posed significant analytical challenges.The development of new approaches to characterize the detailed structure of oligosaccharides in glycoproteins continued to receive great attention.Capillary-HPLC-LIF carried the advantages of capillary high performance liquid chromatography and laser induced fluorescent detection.It could provide good resolution, low sample quantities and excellent sensitivity.So it was better for the analysis of low-abundance carbohydrates.