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FARKA, Zdeněk, Tomáš JUŘÍK, Matěj PASTUCHA and Petr SKLÁDAL. Enzymatic Precipitation Enhanced Surface Plasmon Resonance Immunosensor for the Detection of Salmonella in Powdered Milk. Analytical Chemistry. Washington, DC: American Chemical Society, 2016, vol. 88, No 23, p. 11830-11836. ISSN 0003-2700. Available from: https://dx.doi.org/10.1021/acs.analchem.6b03511.
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Basic information
Original name Enzymatic Precipitation Enhanced Surface Plasmon Resonance Immunosensor for the Detection of Salmonella in Powdered Milk
Authors FARKA, Zdeněk (203 Czech Republic, belonging to the institution), Tomáš JUŘÍK (203 Czech Republic, belonging to the institution), Matěj PASTUCHA (203 Czech Republic, belonging to the institution) and Petr SKLÁDAL (203 Czech Republic, guarantor, belonging to the institution).
Edition Analytical Chemistry, Washington, DC, American Chemical Society, 2016, 0003-2700.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10406 Analytical chemistry
Country of publisher United States of America
Confidentiality degree is not subject to a state or trade secret
WWW URL
Impact factor Impact factor: 6.320
RIV identification code RIV/00216224:14740/16:00092189
Organization unit Central European Institute of Technology
Doi http://dx.doi.org/10.1021/acs.analchem.6b03511
UT WoS 000389556900080
Keywords in English Surface plasmon resonance biosensor; Biocatalyzed precipitation; Food safety; Bacterial pathogen; Salmonella Typhimurium; Atomic force microscopy
Tags rivok
Tags International impact, Reviewed
Changed by Changed by: doc. Mgr. Zdeněk Farka, Ph.D., učo 357740. Changed: 15/9/2018 18:50.
Abstract
Contamination of food by pathogenic bacteria has always been a serious threat for human health. The amount of food exports and imports has been increasing in recent years which requires precise food quality control with short analysis time and simplified sample treatment. Surface plasmon resonance (SPR) immunosensor enhanced by biocatalyzed precipitation was developed for the analysis of Salmonella in dairy products. The specific capture antibody was immobilized on the SPR chip which allowed a direct label-free detection of Salmonella Typhimurium with the limit of detection (LOD) of 104 CFU·mL–1 and the analysis time of 10 min. Alternatively, the secondary detection antibody was conjugated with horseradish peroxidase to provide a signal enhancement by the biocatalyzed conversion of 4-chloro-1-naphthol to insoluble benzo-4-chlorocyclohexadienone. The formation of precipitate was studied in detail by atomic force microscopy (AFM). The sensitivity was increased 40 times in case of the precipitation-enhanced detection compared to the label-free approach. The optimized method provided LOD of 100 CFU·mL–1 with linear range up to 106 CFU·mL–1. The total time of analysis including bacteria binding and enhancement step was below 60 min. The capability to analyze real samples with complex matrices was demonstrated on the detection of Salmonella in powdered milk. The developed sensor represents simple and robust approach for routine monitoring of food contamination.
Links
LQ1601, research and development projectName: CEITEC 2020 (Acronym: CEITEC2020)
Investor: Ministry of Education, Youth and Sports of the CR
Displayed: 20/6/2024 01:46