Journal
IEEE SENSORS JOURNAL
Volume 13, Issue 5, Pages 1835-1839Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2013.2242057
Keywords
Aflatoxin detection; microfluidics; smectite
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Aflatoxins can cause seriously toxic and carcinogenic effects on human health. Current detection methods include immunoaffinity-based assays and high performance liquid chromatography. In this paper, we report a novel aflatoxin detection array based on smectite-polyacrylamide nanocomposite and a new fluorometeric quantification method. Two concentration levels (20-80 ppb/5-15 ppb) of aflatoxin B-1-spiked corn extraction solutions are tested. Microfluidic channels are used to reduce the diffusion length and time of aflatoxin adsorption. By using incident intensity modulation, a simpler fluorometric quantification of aflatoxin concentration on sub-100 ppb levels is achieved with a hand-held 365-nm ultraviolet lamp.
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