RADIOLYSIS OF AQUEOUS SOLUTION OF GLYCYRRHIZIC ACID

He Yongke; Liu Tianwei; Yuan Rongyao; Wu Jilan

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RADIOLYSIS OF AQUEOUS SOLUTION OF GLYCYRRHIZIC ACID

更新时间：2023-04-23

- RADIOLYSIS OF AQUEOUS SOLUTION OF GLYCYRRHIZIC ACID
- Journal of Radiation Research and Radiation Processing Vol. 11, Issue 3, Pages: 129-134,150(1993)
- 作者机构：
  
  1.北京大学技术物理系，北京　100871
- 作者简介：
- 基金信息：
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He Yongke, Liu Tianwei, Yuan Rongyao, et al. RADIOLYSIS OF AQUEOUS SOLUTION OF GLYCYRRHIZIC ACID. [J]. Journal of Radiation Research and Radiation Processing 11(3):129-134,150(1993)
DOI：

He Yongke, Liu Tianwei, Yuan Rongyao, et al. RADIOLYSIS OF AQUEOUS SOLUTION OF GLYCYRRHIZIC ACID. [J]. Journal of Radiation Research and Radiation Processing 11(3):129-134,150(1993) DOI：

摘要

甘草酸的辐解可分为两个过程：（1）生色团,α,、,β,不饱和酮的破坏；（2）抽氢反应导致甘草酸结构破坏，但生色团不破坏。用HPLC分离出四个辐解产物，其一是甘草次酸并测定了它们的G值。用加入俘获剂（甲酸钠）的方法，证明OH•自由基的作用可使配糖键断裂，生成甘草次酸和未知辐解产物Ⅱ，OH•和HO,2,的作用可生成未知辐解产物Ⅰ，未知辐解产物Ⅲ是次级产物。用竞争反应动力学得到OH•自由基与甘草酸的反应速率约为10,10,L•mol,-1•,s,-1,。

Abstract

A study was made on radiolysis of glycyrrhizic acid in dilute aqueous alkaline solution. Radiolysis of glycyrrhizic acid would be divided into two processes: (1) Chromophore (unsaturated ketones) was destroyed; (2) Structure of glycyrrhizic acid was destroyed due to hydrogen abstraction reaction, but chromophore was not destroyed. The G values of radiolysis of glycyrrhizic acid under different atmospheres have been determined. Four radiolytic products were separated by HPLC. Using scavenger method, it showed that glycyrrhetinic acid and unknown products are formed by OH attack. OH attack leads to glucosidic bond rupture. Unknown product is formed by OH and HO,2,. Unknown Ⅲ may be secondary product. Using competition kinetics k,OH-GAH,~10,10,dm,3,mol,-1,s,-1, was got.

关键词

甘草酸甘草次酸甘草甲酸钠γ辐解

Keywords

Glycyrrhizic acidGlycyrrhetinic acidGlycyrrhizaSodium formateRadiolysis

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