Abstract
A functionalized gold nanoparticles bio-barcode technology was developed to detect semicarbazide. In the assay, the hapten CPSEM (4-[[2-(aminocarbonyl) hydrazinylidene] methyl]-benzoic acid) was first prepared and conjugated to bovine serum albumin as the coating antigen. Subsequently, gold nanoparticles dual-labeled with anti-CPSEM monoclonal antibodies and DNA oligonucleotide were synthesized via a one-step preparation method. Enzymatic signal was converted to DNA signal by combining polymerase chain reaction with indirect competitive ELISA (icELISA). The limit of detection of this method could reach 8 pg mL−1 for detecting SEM, about 25 times more sensitive than conventional ELISA. The immunosorbent bio-barcode assay is a rapid high-throughput screening tool adapted for ultra-high sensitive detection.
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This work was supported by the Science and Technology Plan Foundation of Guangdong Province (2005B20401008).
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Yong Tang and Lu Yan—Co-first author.
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Tang, Y., Yan, L., Xiang, Jj. et al. An immunoassay based on bio-barcode method for quantitative detection of semicarbazide. Eur Food Res Technol 232, 963–969 (2011). https://doi.org/10.1007/s00217-011-1462-4
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DOI: https://doi.org/10.1007/s00217-011-1462-4