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Electrochemical Immunosensor Coupled to Cyclone Air Sampler for Detection of Escherichia coli DH5α in Bioaerosols
Author(s) -
Skládal P.,
Švábenská E.,
Žeravík J.,
Přibyl J.,
Šišková P.,
Tjärnhage T.,
Gustafson I.
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100448
Subject(s) - indoor bioaerosol , bioaerosol , chromatography , environmental science , aerosol , contamination , chemistry , environmental chemistry , biology , organic chemistry , ecology
The portable detector ImmunoSMART was combined with the cyclone air sampler to detect the model bioagent E. coli DH5α in bioaerosols. The selected capture antibody was immobilized on gold electrodes, antibody‐peroxidase conjugate served as a tracer. In buffer, the amperometric immunosensor measured 10 3 to 10 8 CFU/mL within 30 min. Detection in air was realized in a closed aerosol chamber. Automated dissemination of the cells, sampling and measurement allowed remote testing of the cyclone/immunodetector. The level of 150 CFU/L in air was clearly indicated (20 min analysis including 5 min sampling) and independently confirmed using the slit sampler and agar cultivation. The results seem promising for further extended tests in both aerosol chamber and field trial conditions.