Abstract：
:Although pre-column derivatization with n-propylamine and acetic anhydride combined with the gas chromatograph was a useful method for the analysis of monosaccharide composition, failure often occurs because of lack of detail information on the mechanism as well as the operating key point in derivatization process. In this study, the key points in the derivatization (lactonization time, the amount of n-propylamine and acetic anhydride) were investigated and optimized to improve the method. Under the optimal conditions, the derivatives of seven neutral monosaccharides and two uronic acids were simultaneouly obtained, after which they were well separated and detected by GC. It was also found that all derivatives of monosaccharides were stable even stored for 20days. The linearity, sensitivity, precision, reproducibility and recovery rate of the improved method were evaluated. Thereafter, five polysaccharide samples from different sources were analyzed to validate the improved method.
journal_name
Food Chemjournal_title
Food chemistryauthors
Wang X,Zhang L,Wu J,Xu W,Wang X,Lü Xdoi
10.1016/j.foodchem.2016.10.008subject
Has Abstractpub_date
2017-04-01 00:00:00pages
198-207eissn
0308-8146issn
1873-7072pii
S0308-8146(16)31625-9journal_volume
220pub_type
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