色谱 ›› 2019, Vol. 37 ›› Issue (5): 491-498.DOI: 10.3724/SP.J.1123.2018.11029

• 研究论文 • 上一篇    下一篇

多孔芳香骨架吸附剂-固相萃取-高效液相色谱法同时测定辣椒粉中4种偶氮类染料

闻威1, 张文芬1, 张岩皓2, 赵无垛1, 张书胜1   

  1. 1. 郑州大学化学与分子工程学院, 河南 郑州 450001;
    2. 香港浸会大学化学系环境与生物分析国家重点实验室, 香港 999077
  • 收稿日期:2018-11-19 出版日期:2019-05-08 发布日期:2015-03-23
  • 通讯作者: 赵无垛,Tel:(0371)67739685,E-mail:zhaowuduo@163.com
  • 基金资助:

    国家自然科学基金项目(21475119,21775140).

Simultaneous determination of four azo dyes in paprika powder by high performance liquid chromatography using a porous aromatic framework as the solid-phase extraction sorbent

WEN Wei1, ZHANG Wenfen1, ZHANG Yanhao2, ZHAO Wuduo1, ZHANG Shusheng1   

  1. 1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;
    2. State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong 999077, China
  • Received:2018-11-19 Online:2019-05-08 Published:2015-03-23
  • Supported by:

    National Natural Science Foundation of China (Nos. 21475119, 21775140).

摘要:

建立了固相萃取-高效液相色谱同时测定辣椒粉中对位红、酸性橙Ⅱ、苏丹红Ⅰ和苏丹红Ⅱ 4种偶氮染料的方法。以多孔芳香骨架-6(PAF-6)材料作为固相萃取吸附剂,考察并获得了影响自制固相萃取柱的萃取效率和吸附容量等主要因素。在优化条件下,4种目标分析物的检出限(LOD)为1.5~7.0 μg/L(信噪比S/N=3),定量限(LOQ)为5.0~22.1 μg/L(S/N=10),加标回收率为76.5%~89.8%,相对标准偏差(RSD)均不大于5.3%(n=6)。此外,基于量子化学计算,考察了PAF-6与目标分析物之间的相互作用机制,结果表明,目标分析物可以稳定地吸附在PAF-6分子上。该方法准确可靠,具有良好的回收率和较高的灵敏度,可用于辣椒粉中4种偶氮类染料的检测。

关键词: 多孔芳香骨架, 高效液相色谱, 固相萃取, 辣椒粉, 偶氮染料

Abstract:

In this study, a solid-phase extraction-high performance liquid chromatography (SPE-HPLC) method was developed for the determination of Para Red, Orange Ⅱ sodium salt, Sudan Ⅰ, and Sudan Ⅱ in paprika powder based on a self-made porous aromatic framework-6 (PAF-6) solid-phase extraction cartridge. The major factors affecting the extraction efficiency and adsorption capacity of this solid-phase extraction were evaluated. Under optimized conditions, the limits of detection (LODs) and limits of quantification (LOQs) of the four target analytes ranged from 1.5 to 7.0 μg/L and 5.0 to 22.1 μg/L, respectively. The recoveries were in the range of 76.5-89.8%, and the relative standard deviation (RSD) was not more than 5.3% (n=6). Moreover, quantum chemistry calculations were performed to investigate the molecular interaction mechanism between the PAF-6 and target analytes. The results indicated that the target molecules could be stably adsorbed onto the PAF-6. The method is accurate, reliable, and sensitive, and can be successfully applied to detect the four azo dyes in paprika powder.

Key words: azo dyes, high performance liquid chromatography (HPLC), paprika powder, porous aromatic framework, solid phase extraction (SPE)

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