循环化学发光快速区分醇类化合物

发布时间：2018-03-20 04:35

本文选题：循环化学发光　切入点：催化发光　出处：《分析化学》2017年11期 　论文类型：期刊论文

【摘要】：以纳米氧化镁为催化剂构建了循环化学发光(Cyclic chemiluminescence,CCL)系统,以醇类化合物为研究对象,研究了反应物浓度、反应温度和检测波长对CCL分析的影响。结果表明,CCL检测信号满足一级指数衰减规律,每个反应均对应一个描述其信号变化规律的指数方程,其初变量A与反应物浓度呈线性关系,衰减系数k是与反应物浓度无关的特征常数。以异丁醇为例,其A值与浓度在0.89~14.24 mg/L之间呈良好的线性关系,线性范围内的k值平均值为32.0,RSD=2.2%,可根据k值进行定性分析,根据A值进行定量分析。采用此系统分析了8种醇类化合物,发现其k值存在显著差异,如正丁醇、异丁醇、叔丁醇的k值分别为27.2±0.2、32.0±0.8及19.5±0.1,据此提出了一种快速区分醇类同系物及结构异构体的新方法。
[Abstract]:The cyclic chemiluminescence CCL system was constructed using nanometer magnesium oxide as catalyst. The concentration of reactants was studied with alcohols as the research object. The effect of reaction temperature and detection wavelength on the CCL analysis. The results show that the detected signal satisfies the first-order exponential attenuation law, and each reaction corresponds to an exponential equation describing the variation law of its signal. The initial variable A has a linear relationship with the reactant concentration, and the attenuation coefficient k is a characteristic constant independent of the reactant concentration. Taking isobutanol as an example, there is a good linear relationship between the A value and the concentration of the reactant in the range of 0.89 ~ 14.24 mg/L. The average value of k in the linear range is 32.0 RSD2.2.It can be qualitatively analyzed according to k value and quantitatively analyzed according to A value. By using this system, eight alcohols are analyzed, and it is found that there are significant differences in k values, such as n-butanol, isobutanol, isobutanol, isobutanol, n-butanol, isobutanol, n-butanol, isobutanol. The k values of tert-butanol were 27.2 卤0.2g 32.0 卤0.8 and 19.5 卤0.1, respectively. A new method to distinguish the isomers of alcohols and their isomers was proposed.
【作者单位】：中山大学化学学院;
【基金】：国家自然科学基金(Nos.21475153、21605163、21675178) 高校基本科研业务费青年教师培育项目(No.31000-31610743)资助~~
【分类号】：O657.3;TQ223.1

【相似文献】