摘要
通过别洛索夫-扎鲍京斯基(B-Z)振荡反应研究不同产地中药紫菀鉴别的鉴别,将紫菀粉末加入H2SO4-Ce(SO4)2-CH2(COOH)2-KBrO3中,干扰化学振荡体系,用电化学工作站记录数据,并对温度、紫菀用量等反应条件进行了考察,确定体系的最佳实验条件为12 mL(3.0 mol/L)H2SO4溶液、3 mL(0.1 mol/L)Ce(SO4)2溶液、6 mL(1.0 mol/L)CH2(COOH)2和3 mL(0.2 mol/L)KBrO3溶液,温度310 K、加入0.4 g紫菀粉末,获得了不同产地紫菀的电化学指纹图谱。通过对不同产地中药材紫菀电化学指纹图谱的研究,发现不同产地的紫菀的指纹图谱主要参数有较大区别。该方法简便、准确、可靠,可方便的用于不同产地紫菀的鉴别。
The electrochemical fingerprints of radix asteris from different places have been studied by Belousov-Zhabotin- skii oscillation system. With adding power of Radix Asteris to chemical oscillation system of H2SO4-Ce （ SO4 ）2-CH2- （COOH）2KBrO3 ,and the data of potential and time was re- corded by the electrochemical workstation. The temperature of B-Z oscillation system, stirring speed, the added amount of ra- dix asteris are studied also. The results showed that the opti- mum conditions were as follows： 12 mL 3.0 mol/L sulfuric acid,3 mL 0.1 mol/L cerium（ IV ） sulfate,6 mL 1.0 mol/L malonic acid, 3 mL 0. 2 mol/L potassium bromate, reaction temperature 310 K,0.4 g powder of radix asteris. The electro- chemical fingerprints of radix asteris from different places showed significantly different characteristics, such as the max- imum potential, induction time and oscillation lifetime, etc. So this method can be used to identify radix asteris from different origins and has the advantage of convenience, sensitivity and precision.
出处
《化学试剂》
CAS
CSCD
北大核心
2012年第11期1004-1008,共5页
Chemical Reagents
基金
国家自然科学基金资助项目(30901973)
国家十二五科技支撑资助项目(2011BAI04B05)
关键词
电化学指纹图谱
化学振荡体系
紫菀
振荡微观指纹图谱
鉴别
electrochemical fingerprint
chemical oscillation system
radix asteris
micro-oscillation fingerprints
identify
