Title: Highly Specific Monoclonal Antibody and Sensitive Quantum Dot Beads-Based Fluorescence Immunochromatographic Test Strip for Tebuconazole Assay in Agricultural Products.

Authors: Wang, Yulong; Xu, Junli; Qiu, Yulou; Li, Pan; Liu, Beibei; Yang, Lifei; Barnych, Bogdan; Hammock, Bruce D; Zhang, Cunzheng

Published In J Agric Food Chem, (2019 Aug 14)

Abstract: A monoclonal antibody (mAb) was raised against tebuconazole (TEB) using a hapten where the p-chloro substituent of the TEB molecule was replaced with a long-chain carboxylic acid. The resulting mAb showed high sensitivity and specificity against TEB characterized by ELISA with a half-maximal inhibitory concentration (IC50) of 0.19 ng mL-1 and with cross-reactivity (CR) values below 0.01% to several analogues of triazole fungicides. On the basis of the mAb produced, a quantum dot beads-based fluorescence immunochromatographic test strip assay (QBs-FITSA) was developed for rapid and sensitive detection of TEB in agricultural product samples. The QBs-FITSA exhibited a linear detection range from 0.02 to 1.25 ng mL-1 with a limit of detection (LOD) of 0.02 ng mL-1. Furthermore, using produced mAb, multiple high-throughput rapid immunoassay formats could be achieved as a convenient monitoring tool for evaluation of human and environmental exposure to TEB.

PubMed ID: 31356079

MeSH Terms: Antibodies, Monoclonal/analysis; Brassica/chemistry*; Cucumis sativus/chemistry*; Food Contamination/analysis; Fungicides, Industrial/analysis*; Fungicides, Industrial/isolation & purification; Immunoassay/instrumentation; Immunoassay/methods*; Limit of Detection; Quantum Dots/chemistry; Triazoles/analysis*; Triazoles/isolation & purification; Triticum/chemistry*