Citation: WEN Wei, ZHANG Wenfen, ZHANG Yanhao, ZHAO Wuduo, ZHANG Shusheng. 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[J]. Chinese Journal of Chromatography, ;2019, 37(5): 491-498. doi: 10.3724/SP.J.1123.2018.11029 shu

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

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 Date: 19 November 2018

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

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.
- porous aromatic framework,
- solid phase extraction (SPE),
- high performance liquid chromatography (HPLC),
- azo dyes,
- paprika powder
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沈阳化工大学材料科学与工程学院沈阳 110142