循环化学发光快速区分醇类化合物

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...

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Bibliographic Details
Published in分析化学 Vol. 45; no. 11; pp. 1628 - 1634
Main Author 钟燕辉 卢晓钿 黄婉婷 张润坤 李攻科
Format Journal Article
LanguageChinese
Published 中山大学化学学院,广州,510275 2017
Subjects
催化发光
循环化学发光
氧化镁
醇类
氧化镁
Cyclic chemiluminescence
醇类
Magnesium oxide
Cataluminescence
催化发光
循环化学发光
Alcohols
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Summary: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。
Bibliography:ZHONG Yan-Hui, LU Xiao-Tian, HUANG Wan-Ting, ZHANG Run-Kun, LI Gong-Ke（School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China）
22-1125/O6
Cyclic chemiluminescence; Cataluminescence; Magnesium oxide; Alcohols
Rapid discrimination of compounds with similar structures and properties is a hot topic in analytical chemistry. In this study,a cyclic chemiluminescence（ CCL） system was designed by using nano-magnesium oxide as catalyst. The effects of reactant concentration,reaction temperature and detection wavelength on CCL analysis were studied. It was found that the CCL signal satisfied the first order exponential decay law. Each reaction had an exponential decay equation（ EDE） describing its signal change law. The initial variable A was proportional to the reactant concentration. The decay-coefficient k was a characteristic constant that was independent of the reactant concentration. For iso-butanol,it ＇ s A-values versus concentration was linear in0.89-14.24 mg/L,the average of k-value in this range wa
ISSN:0253-3820
DOI:10.11895/j.issn.0253-3820.171010