Detection of Sudan I in Foods by a MOF‐5/MWCNT Modified Electrode

Abstract

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.

Rapid quantitative detection of luteolin using an electrochemical sensor based on electrospinning of carbon nanofibers doped with single-walled carbon nanoangles

“…6 Electrochemical techniques stand out because of their high sensitivity, operational simplicity, convenient handling, and ability to rapidly detect luteolin. [7][8][9][10] In recent years, carbon nanomaterials such as carbon nanotubes, carbon nanoangles, and graphene have attracted considerable attention owing to their good electrical conductivity and large surface area. Single-walled carbon nanoangles (SWCNHs) are horn-like graphite tubes with a conical structure that polymerize to form dahlia-like, seed-like, and bud-like aggregates.…”

Synthesis and antioxidant activity of six novel N-ferrocenylmethyl-N-(nitrophenyl)- and -N-(cyanophenyl)-acetamides: Cyclic voltammetry and molecular docking studies

“…Recently, ferrocene derivatives have been widely studied because of their versatile potential applications in many research fields such as medicinal chemistry [1][2][3][4][5][6][7], material sciences [8], and diagnostic applications fields [9]. N-ferrocenylmethylamines and their derivatives, in particular, N-ferrocenylmethyl-N-(nitrophenyl)-and -N-(cyanophenyl)aniline, have shown important biological activities due to their promising biological potential as anticancer properties [10,11], antimicrobial agents [12], antioxidants [13,14], and anti-proliferative agents against MCF-7 human breast cancer cell lines [15].…”

Potentiometric MIP-Modified Screen-Printed Cell for Phenoxy Herbicides Detection

“…Potentiometric and, more in general, all electrochemical techniques have several advantages compared to the classic ones: the instrumentation is less expensive, the time of analysis is low, the apparatus may be portable, the sensors can be used for in situ measurements, and the surface of the electrodes can be modified in order to obtain more specific and sensitive detections. In particular, the electrodic surface can be activated with different kinds of modifiers such as multi-Walled carbon nano tubes (MWCNTs) [ 20 , 21 , 22 , 23 , 24 , 25 ], metal nano particles (NPs) [ 26 , 27 , 28 , 29 , 30 , 31 ], graphene [ 32 , 33 , 34 , 35 , 36 , 37 ], metal organics frameworks (MOFs) [ 38 , 39 , 40 , 41 , 42 , 43 ] in order to enhance the sensitivity, aptamers, antibodies [ 44 , 45 , 46 , 47 , 48 , 49 ], enzymes [ 50 , 51 , 52 , 53 , 54 , 55 ], or molecularly imprinted polymers (MIPs) [ 56 , 57 , 58 , 59 , 60 , 61 ] to improve the selectivity.…”