Electrochemical impedimetric biosensors for food safety

Chai, Changhoon; Oh, Se‐Wook

doi:10.1007/s10068-020-00776-w

Cited by 27 publications

(14 citation statements)

References 74 publications

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“…The identification of an analyte by amperometric transducer is provided by the calculation of current data generated after the reduction and oxidation of electroactive species immobilized on the working surface after setting an appropriate potential [ 127 ]. Electrochemical impedance spectroscopy (EIS) method monitors the alterations that occur in the interface between electrode surface, modified by a nanostructured platform in contact with redox probe [ 134 ].…”

Section: Techniques Used In Detection and Analysis Of Mycotoxinsmentioning

confidence: 99%

The Existing Methods and Novel Approaches in Mycotoxins’ Detection

et al. 2021

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Mycotoxins represent a wide range of secondary, naturally occurring and practically unavoidable fungal metabolites. They contaminate various agricultural commodities like cereals, maize, peanuts, fruits, and feed at any stage in pre- or post-harvest conditions. Consumption of mycotoxin-contaminated food and feed can cause acute or chronic toxicity in human and animals. The risk that is posed to public health have prompted the need to develop methods of analysis and detection of mycotoxins in food products. Mycotoxins wide range of structural diversity, high chemical stability, and low concentrations in tested samples require robust, effective, and comprehensible detection methods. This review summarizes current methods, such as chromatographic and immunochemical techniques, as well as novel, alternative approaches like biosensors, electronic noses, or molecularly imprinted polymers that have been successfully applied in detection and identification of various mycotoxins in food commodities. In order to highlight the significance of sampling and sample treatment in the analytical process, these steps have been comprehensively described.

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Section: Techniques Used In Detection and Analysis Of Mycotoxinsmentioning

confidence: 99%

The Existing Methods and Novel Approaches in Mycotoxins’ Detection

et al. 2021

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“…Experientially obtained impedance data are typically simulated by equivalent electric circuits (EEC) [26][27][28][29][30]. The circuit is proposed in Figure 2a.…”

Section: Equivalent Electric Circuitsmentioning

confidence: 99%

Dry Film Resist Laminated Microfluidic System for Electrical Impedance Measurements

et al. 2021

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In micro-electrical-mechanical systems (MEMS), thick structures with high aspect ratios are often required. Dry film photoresist (DFR) in various thicknesses can be easily laminated and patterned using standard UV lithography. Here, we present a three-level DFR lamination process of SUEX for a microfluidic chip with embedded, vertically arranged microelectrodes for electrical impedance measurements. To trap and fix the object under test to the electrodes, an aperture is formed in the center of the ring-shaped electrodes in combination with a microfluidic suction channel underneath. In a proof-of-concept, the setup is characterized by electrical impedance measurements with polystyrene and ZrO2 spheres. The electrical impedance is most sensitive at approximately 2 kHz, and its magnitudes reveal around 200% higher values when a sphere is trapped. The magnitude values depend on the sizes of the spheres. Electrical equivalent circuits are applied to simulate the experimental results with a close match.

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“…Food-borne pathogens, such as Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes, threaten public health, causing different food-borne diseases and deaths [1]. Since small amounts of bacteria are found in food, detection methods capable of detecting even small bacterial quantities are needed [2]. The culture-based detection method, a gold standard for pathogen detection, is time-consuming and labor-intensive [3].…”

Section: Introductionmentioning

confidence: 99%

A Review of Isothermal Amplification Methods and Food-Origin Inhibitors against Detecting Food-Borne Pathogens

Moon

Lee

2022

Foods

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The isothermal amplification method, a molecular-based diagnostic technology, such as loop-mediated isothermal amplification (LAMP) and recombinase polymerase amplification (RPA), is widely used as an alternative to the time-consuming and labor-intensive culture-based detection method. However, food matrices or other compounds can inhibit molecular-based diagnostic technologies, causing reduced detection efficiencies, and false-negative results. These inhibitors originating from food are polysaccharides and polyphenolic compounds in berries, seafood, and vegetables. Additionally, magnesium ions needed for amplification reactions can also inhibit molecular-based diagnostics. The successful removal of inhibitors originating from food and molecular amplification reaction is therefore proposed to enhance the efficiency of molecular-based diagnostics and allow accurate detection of food-borne pathogens. Among molecular-based diagnostics, PCR inhibitors have been reported. Nevertheless, reports on the mechanism and removal of isothermal amplification method inhibitors are insufficient. Therefore, this review describes inhibitors originating from food and some compounds inhibiting the detection of food-borne pathogens during isothermal amplification.

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Electrochemical impedimetric biosensors for food safety

Cited by 27 publications

References 74 publications

The Existing Methods and Novel Approaches in Mycotoxins’ Detection

The Existing Methods and Novel Approaches in Mycotoxins’ Detection

Dry Film Resist Laminated Microfluidic System for Electrical Impedance Measurements

A Review of Isothermal Amplification Methods and Food-Origin Inhibitors against Detecting Food-Borne Pathogens

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