Determination of Fe3+ in Foods by Fluorescence Spectroscopy Using a Zinc-Based Metal-Organic Framework Material

doi:10.7506/spkx1002-6630-201824049

FOOD SCIENCE ›› 2018, Vol. 39 ›› Issue (24): 327-331.doi: 10.7506/spkx1002-6630-201824049

• Safety Detection • Previous Articles

Determination of Fe3+ in Foods by Fluorescence Spectroscopy Using a Zinc-Based Metal-Organic Framework Material

LIU Zhao, MA Deyun, SUN Zhihui

(School of Food and Pharmaceutical Engineering, Zhaoqing University, Zhaoqing 526061, China)

Received:2018-12-25 Revised:2018-12-25 Online:2018-12-25 Published:2018-12-17

Abstract

Abstract: In this paper, a zinc-based metal organic framework, [(Me2NH2)2Zn3(fdc)4]n·DMA (Zn-MOF), was prepared from 2,5-furandicarboxylic acid and Zn(NO3)2·6H2O in N,N-dimethylformamide (DMF) under solvothermal condition. Fluorescence spectroscopic analysis revealed that the material showed emission maxima at 379 and 398 nm. The effects of 16 metal ions often coexisting in foods on the fluorescence intensity of the material were explored. The results indicated that Fe3+ could selectively quench the fluorescence of the material. In addition, the effects of Fe3+ concentration, soaking time and metal ion mixtures (Fe3+-M+/2+/3+) on the sensitivity of fluorescence quenching were also investigated. Our results showed that Zn-MOF exhibited high selectivity for Fe3+. Thus, this Zinc-based metal-organic framework material could be used as a fluorescent probe for the determination of Fe3+ in foods.

Key words: zinc-based metal-organic framework (Zn-MOF), fluorescence spectroscopy, Fe3+, selective sensing

CLC Number:

TQ57
TS207.3

LIU Zhao, MA Deyun, SUN Zhihui. Determination of Fe3+ in Foods by Fluorescence Spectroscopy Using a Zinc-Based Metal-Organic Framework Material[J]. FOOD SCIENCE, 2018, 39(24): 327-331.

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Determination of Fe3+ in Foods by Fluorescence Spectroscopy Using a Zinc-Based Metal-Organic Framework Material

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