Journal
ANALYTICAL LETTERS
Volume 41, Issue 13, Pages 2344-2353Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032710802350518
Keywords
AFB; Aflatoxin; assay; biosensor; electrochemical; mycotoxin
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Funding
- Ministry of Industry and Trade of the Czech Republic [2A-1TP1/009]
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Electrochemical immunosensor based on immobilized aflatoxin B1 (AFB)-albumin conjugate and polyclonal antibody against AFB1 was performed for a competitive assay of AFB1 in capsicum spice. Spiked samples were used for construction of calibration curve. The proved limit of detection was 2.4ppb. Immunosensor long-term stability was also estimated. Decrease of immunosensor sensitivity was less than 10% when stored in a refrigerator and approximately 22% for the immunosensor preserved at laboratory temperature for two weeks. Consequent performance of immunosensors for assay of real capsicum spice samples with proven aflatoxins presence produced good correlation with the data from valid method (high-performance liquid chromatography with fluorescence detector).
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