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Detection of Sudan I in Foods by a MOF‐5/MWCNT Modified Electrode
Author(s) -
Li Xueyan,
Sun Xiuxiu,
Li Maoguo
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202003559
Subject(s) - detection limit , electrode , electrochemistry , linear range , materials science , carbon nanotube , composite number , nanotechnology , chemistry , composite material , chromatography
Sudan I (1‐Phenylazo‐2‐naphthol) is often found in food samples. However, Sudan I could be metabolized to possible carcinogenic amines in the liver, stomach intestine, and human skin. Hence, it is of crucial importance to develop efficient methods for the quantification of trace Sudan I in foodstuffs. Here, we developed a sensitive electrochemical method for detection of Sudan I using MOF‐5 decorated Multi‐walled carbon nanotubes (MOF‐5/MWCNTs) modified electrode. The electrochemical behaviour of different modified electrodes toward Sudan I have been studied in detail. The results indicated that MOF‐5/MWCNTs composite‐modified electrode has a higher electrocatalytic activity towards Sudan I. Under the optimal conditions, the modified electrode showed a wide linear current response in the concentration range of 0.05‐50 μM, with a detection limit of 0.0318 μM (S/N=3). As a proof of concept, the proposed method was used for detecting Sudan I in ketchup and Chilli powder with satisfactory results.