...
首页> 外文期刊>Journal of Wood Chemistry and Technology >On the Determination of β-Aryl Ether Units in Wood Lignin by an Ozonation Method
【24h】

On the Determination of β-Aryl Ether Units in Wood Lignin by an Ozonation Method

机译:臭氧法测定木材木质素中β-芳基醚单元的研究

获取原文
获取原文并翻译 | 示例
           

摘要

The determination of lignin structures by ozonation is rather unique and unlike other analytical techniques is based largely on the formation of side-chain oxidation products. Also, it can readily reveal the proportion of the two stereoisomers of β-aryl ether structures from the yields of erythronic (E) and threonic (T) acids. We have observed that the relative yields of these two acids vary significantly depending on how they are determined. For example, the E/T ratio of these two tetronic acids from the ozonation of spruce wood lignin in situ varies from 1.10 to 1.57 based on their analysis as the free acid and lactone derivatives, respectively. Thus, the work-up procedure of the reaction products is very important to the ozonation technique.
机译:通过臭氧化测定木质素结构是非常独特的,并且与其他分析技术不同,它主要基于侧链氧化产物的形成。而且,它可以很容易地从赤藓酸(E)和苏糖酸(T)的产率中揭示β-芳基醚结构的两种立体异构体的比例。我们已经观察到,这两种酸的相对产率取决于测定方法的不同。例如,根据对云杉木材木质素原位臭氧化的结果,这两种tetronic酸的E / T比分别为游离酸和内酯衍生物,分析范围为1.10至1.57。因此,反应产物的后处理程序对臭氧化技术非常重要。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号