| N,O-羧甲基壳聚糖羧化度计算式的修正 |
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| 引用本文： | 刘长霞,陈国华,晋治涛,孙明昆,高从堵.N,O-羧甲基壳聚糖羧化度计算式的修正[J].北京化工大学学报(自然科学版),2004,31(2):14-17. |
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| 作者姓名： | 刘长霞 陈国华 晋治涛 孙明昆 高从堵 |
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| 作者单位： | 中国海洋大学化学化工学院,青岛,266003;沧州师范专科学校化学系,沧州,061000;中国海洋大学化学化工学院,青岛,266003;国家海洋局杭州水处理技术研究开发中心，杭州 310012 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 通过N,O-羧甲基壳聚糖电位滴定曲线与模型化合物氨基葡萄糖、羧甲基纤维素钠、N-羧甲基壳聚糖以及标准盐酸溶液电位滴定曲线的比较,重新确定了N,O-羧甲基壳聚糖电位滴定曲线突跃的意义并推断出样品羧甲基存在形式和壳聚糖的结构组成。依据壳聚糖结构单元组成及羧甲基的存在形式,提出新的羧化度计算式.
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| 关 键 词： | N O-羧甲基壳聚糖 羧化度 电位滴定 |
| 收稿时间： | 2003-07-01 |
| 修稿时间： | 2003年7月1日 |
Modification of the formula for calculation of substitution degree of N, O-carboxymethylchitosan |
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| Liu Chang xia , Chen Guo hua Jin Zhi tao Sun Ming kun Gao Cong jie.Modification of the formula for calculation of substitution degree of N, O-carboxymethylchitosan[J].Journal of Beijing University of Chemical Technology,2004,31(2):14-17. |
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| Authors: | Liu Chang xia Chen Guo hua Jin Zhi tao Sun Ming kun Gao Cong jie |
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| Institution: | 1 College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China; 2 Department of Chemistry, Cangzhou Normal College, Cangzhou 061000, China; 3 Development Center of Water Treatment Technology SOA Hangzhou, Hangzhou 310012, China |
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| Abstract: | The potentiometric titration curve of N,O carboxymethylchitosan was compared with that of the model compounds and standard HCl. The meaning of abrupt change in the potentiometric titration curve of N,O carboxymethylchitosan was reaffirmed, and the existing species of carboxyl group and the structural constitution of chitosan were inferred. A new formula for calculation of substitution degree of N,O carboxymethylchitosan was given on the basis of existing species of carboxyl group and the structural constitution of chitosan. |
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| Keywords: | N O carboxymethylchitosan degree of substitution potentiometric titration |
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