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  • Title: An electrochemiluminescence sensor for bromate assay based on a new cationic polythiophene derivative.
    Author: Li X, Li J, Wang H, Li R, Ma H, Du B, Wei Q.
    Journal: Anal Chim Acta; 2014 Dec 10; 852():69-73. PubMed ID: 25441881.
    Abstract:
    A sensitive electrochemiluminescence (ECL) sensor was fabricated for bromate assay based on a cationic polythiophene derivative, poly[3-(1,1'-dimethyl-4-piperidinemethylene)thiophene-2,5-diyl chloride] (PTh-D)/nafion modified Au electrode. Bromate was used as the coreactant as well as detecting analyte in the ECL sensor for the first time. The prepared PTh-D exhibited excellent solubility, strong and stable cathodic ECL activity. PTh-D can be immobilized on the surface of Au electrode via AuS bonding and nafion and chitosan were also used to immobilize PTh-D. The fabricated sensor exhibited a good linear relationship between the ECL intensities and the concentrations of BrO3(-) ranging from 1 μM to 0.1 M with a detection limit of 1 μM. This proposed method not only expands the application of PTh-D, but also opens new doors toward the detection of BrO3(-).
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