Magnetic metal-organic frameworks as adsorbents for the detection of azo pigments in food matrices
文献类型： 外文期刊
第一作者： Cheng, Lei
作者： Cheng, Lei;Huang, Rong;Cao, Qiang;Liu, Na;Li, Peiyi;Sun, Mengmeng;Qin, Haiyang;Wu, Lidong;Cao, Qiang;Liu, Na;Li, Peiyi;Sun, Mengmeng;Qin, Haiyang
作者机构：
关键词： Selective separation; New coccine; Lemon yellow; HPLC-MS
期刊名称：FOOD CHEMISTRY （ 影响因子：8.8； 五年影响因子：8.6 ）
ISSN： 0308-8146
年卷期： 2023 年 402 卷
页码：
收录情况： SCI
摘要： Azo pigments with azo functional groups (-N--N-) are commonly used in foods. Through rational design, here we report synthesis of a novel magnetic metal-organic framework (MOF-545) and the use of Fe3O4@MOF-545 for the selective separation of azo pigments from beverages. We find that Fe3O4@MOF-545 exhibits excellent adsorption/removal capacities for new coccine (NC, 459 mg g-1) and lemon yellow (LY, 476 mg g-1) individ-ually. The results indicated that the adsorption capacities of Fe3O4@MOF-545 were 5 times higher than reported previously. The large surface area (120.4 m2/g) and the suitable pore size (1.6 nm) of Fe3O4@MOF-545 provided multiple accessible channels for azo pigment adsorption. The adsorption kinetics, stability, recovery, and reus-ability of Fe3O4@MOF-545 were all reported. The recoveries ranged from 92.9 to 104.5%, reflecting the capacity of MOF-545 to efficiently separate NC and LY. Fe3O4@MOF-545 is suitable for azo pigment determination and separation in food matrices.
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