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Conducting polymer functionalized Cu-metal organic framework–based electrochemical immunosensor for rapid and sensitive quantitation of Escherichia coli O157:H7
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Conducting polymer functionalized Cu-metal organic framework–based electrochemical immunosensor for rapid and sensitive quantitation of Escherichia coli O157:H7
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Journal Article
Conducting polymer functionalized Cu-metal organic framework–based electrochemical immunosensor for rapid and sensitive quantitation of Escherichia coli O157:H7
2024
Overview
Escherichia
coli
(
E. coli
) O157:H7 is an important food-borne pathogen that can cause hemorrhagic diarrhea and enteritis in humans and animals. Realizing the rapid quantitation of
E. coli
O157:H7 is of great significance for the guarantee of food safety and disease control. In this study, an electrochemical immunosensing technique based on a functionalized composite of Cu-metal organic framework (Cu-MOF) and poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate) (PEDOT:PSS) is developed, achieving rapid and sensitive quantitation of
E. coli
O157:H7 in food and clinical feces samples. The organic functionalization of Cu-MOF significantly improves the interface conductivity to facilitate electron transfer and provides the sulfonic groups (–SO
3
H) to conjugate bio-recognizing elements for target determination. The immunosensor delivers a linear detection range of 3 × 10
2
~ 3 × 10
8
cfu/mL, a low limit of detection (LOD) of 7.4 cfu/mL, and a short analysis time of 40 min. In addition, it does not show any cross-reactivity with other common pathogens and exhibits high repeatability with relative standard deviations (RSDs) all lower than 2.09%, providing a promising approach for warranting food safety and control of
E. coli
O157:H7 disease.
Graphical Abstract
Publisher
Springer Vienna,Springer Nature B.V
Subject
/ Animals
/ Antibodies, Immobilized - chemistry
/ Antibodies, Immobilized - immunology
/ Biosensing Techniques - methods
/ Bridged Bicyclo Compounds, Heterocyclic - chemistry
/ Carbon
/ Characterization and Evaluation of Materials
/ Chemistry and Materials Science
/ Copper
/ Diarrhea
/ E coli
/ Electrochemical Techniques - methods
/ Escherichia coli O157 - immunology
/ Escherichia coli O157 - isolation & purification
/ Ethanol
/ Food
/ Food contamination & poisoning
/ Humans
/ Metal-Organic Frameworks - chemistry
/ Nitrates
