Development of a monoclonal antibody-based, congener-specific and solvent-tolerable direct enzyme-linked immunosorbent assay for the detection of 2,2 ', 4,4 '-tetrabromodiphenyl ether in environmental samples

作者：Wang Jia; Li Hao; Shelver Weilin L; Wang Zhanhui; Li Qing X; Li Ji; Xu Ting^*

来源：Analytical and Bioanalytical Chemistry, 2011, 401(7): 2249-2258.

DOI：10.1007/s00216-011-5283-x

• 2,2 ',4,4 '-Tetrabromodiphenyl ether
• Polybrominated diphenyl ethers
• Flame retardant
• Enzyme-linked immunosorbent assay
• Monoclonal antibody

A sensitive direct enzyme-linked immunosorbent assay (ELISA) for the specific detection of 2,2', 4,4'-tetrabromodiphenyl ether (BDE-47) in environmental samples was developed. A hapten mimicking BDE-47 was synthesized by introducing a butyric acid spacer into 5-hydroxy-BDE-47 and coupled to keyhole limpet hemocyanin to form an immunogen for the production of monoclonal antibodies (Mabs) against BDE-47. The most sensitive direct ELISA was formatted with a Mab, designated as 4F2, in combination with 5-(2,4-dibromophenoxy) pentanoic acid peroxidase as a tracer. The inhibition half-maximum concentrations and limit of detection of BDE-47 in phosphate buffered saline with 25% DMSO were 1.4 +/- 0.05 and 0.1 ng mL(-1), respectively. Cross-reactivity values of the ELISA with the tested BDE congeners and metabolites were <= 5.8%. This assay was used to determine BDE-47 in soil, sediment and house dust samples after ultrasonic extraction, simple cleanup and concentration steps. The average recoveries, repeatabilities (intraday extractions and analyses), and intra-laboratory reproducibilities (interday extractions and analyses) were in a range of 92-126%, 8-19% and 9-25%, respectively. Applied to 44 real samples, the results of this assay displayed a statistically significant correlation with those of a gas chromatography-mass spectrometry method (R(2)=0.79-0.85), indicating this ELISA is a suitable tool for environmental analyses of BDE-47.

• 出版日期2011-10
• 单位中国农业大学