| 海藻酸钠离子交换过程的圆二色谱 |
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| 引用本文： | 李红兵.海藻酸钠离子交换过程的圆二色谱[J].化工学报,2006,57(10):2497-2502. |
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| 作者姓名： | 李红兵 |
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| 作者单位： | 天津大学化工学院，天津 300072 |
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| 摘 要： | 引言 海藻酸钠胶是从海藻细胞壁和细胞间质中提取的天然生物大分子,由古洛糖醛酸(记为G单元)与其立体异构体甘露糖醛酸(记为M单元)两种结构单元通过α(1-4)糖苷键链接而成的线性嵌段共聚物.
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| 关 键 词： | 光谱滴定法 海藻酸 圆二色谱 摩尔椭圆值 钙离子 锌离子 |
| 文章编号： | 0438-1157（2006）10-2497-06 |
| 收稿时间： | 10 27 2005 12:00AM |
| 修稿时间： | 2005-10-272006-04-25 |
Research of linking process of alginate with divalent ions by circular dichroism |
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| LI Hongbing.Research of linking process of alginate with divalent ions by circular dichroism[J].Journal of Chemical Industry and Engineering(China),2006,57(10):2497-2502. |
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| Authors: | LI Hongbing |
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| Affiliation: | School of Chemical Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | The steadystate interaction research of calcium and zinc ions with alginate during the sol-gel transition by circular dichroism showed that this process included two phases.During the first phase before the transition point the structure of the gel-conjugate of alginate-metal ions was homological in the range of linear change.The rate and mechanism have the similar change.Molar ellipticity ［θ］alginateCa at wavelength 200 nm and 205 nm，molar ellipticity ［θ］alginateZn at wavelength 195 nm and 200 nm could be obtained through calculation with spectrum titration.For the same divalent cation ion，the critical sol-gel transition points were different for alginates with different compositions. |
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| Keywords: | spectrum titration alginate circular dichroism molar ellipticity calcium ion zinc ion |
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