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  • Title: Analysis of the Fungicide Boscalid in Horticultural Crops Using an Enzyme-Linked Immunosorbent Assay and an Immunosensor Based on Surface Plasmon Resonance.
    Author: Hirakawa Y, Yamasaki T, Harada A, Ohtake T, Adachi K, Iwasa S, Narita H, Miyake S.
    Journal: J Agric Food Chem; 2015 Sep 16; 63(36):8075-82. PubMed ID: 26340386.
    Abstract:
    A direct competitive enzyme-linked immunosorbent assay (dc-ELISA) and an immunosensor based on surface plasmon resonance (SPR-sensor) were developed for fungicide boscalid determination in horticultural crops. To produce antiboscalid monoclonal antibodies (MoAb BSC7 and MoAb BSC72) for these assays, a hapten of boscalid was synthesized and conjugated to keyhole limpet hemocyanin for Balb/c mouse immunization. The working range of the dc-ELISA was 0.8-16 ng/mL with MoAb BSC7 and 2.5-120 ng/mL with MoAb BSC72, and that of the SPR-sensor was 17-80 ng/mL with MoAb BSC7. The dc-ELISA and SPR-sensor were compared for their sensitivity in determining boscalid residues at the maximum residue limit of 1-40 mg/kg for horticultural crops in Japan. Recovery of the spiked boscalid was 85-109% by the SPR-sensor and 100-124% by the dc-ELISA. On real tomato samples, the results obtained by both of these immunoassays correlated well with the results obtained by high-performance liquid chromatography.
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