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題名 | HPLC Analysis of N-acetyl-chito-oligosaccharides during the Acid Hydrolysis of Chitin=幾丁質酸水解過程中所產生N-乙醯幾丁寡醣之HPLC分析 |
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作者 | 張克亮; 李宗洋; 傅文榮; | 書刊名 | 藥物食品分析 |
卷期 | 8:2 2000.06[民89.06] |
頁次 | 頁75-83 |
分類號 | 346.217 |
關鍵詞 | 幾丁質; N-乙醯幾丁寡醣; 酸水解; 高效能液相層析; Chitin; N-acetyl-chito-oligosaccharides; Acid hydrolysis; HPLC; |
語文 | 英文(English) |
英文摘要 | The hydrolysis of chitin (93% N-acetylation) by hydrochloric acid produced N-acetyl-chito-oligosaccharides (NACOs) with low degrees of polymerization (DP) from 2 to 6. The HPLC retention time of NACOs decreased with increased water content in the mobile phase. A gradient elution procedure, using acetonitrile to water (v/v) ratio lowered linearly from 80/20 to 60/40 within 60 min, provided optimal resolution and characterization for the NACOs. The natural logarithm of the retention time of NACOs correlated linearly with the DP values. Hydrolysis of chitin followed a series-parallel reaction mechanism. At the same time the NACOs with higher DP's were generated from chitin, and were degraded by hydrochloric acid to form products with lower DP's. More NACOs with higher DP's were produced under conditions with higher concentrations of hydrochloric acid and a shorter reaction period. Higher temperatures facilitated the generation of NACOs with lower DP's. |
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