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  • Title: A competitive immunochromatographic assay based on a novel probe for the detection of mercury (II) ions in water samples.
    Author: Zhou Y, Zhang Y, Pan F, Li Y, Lu S, Ren H, Shen Q, Li Z, Zhang J, Chen Q, Liu Z.
    Journal: Biosens Bioelectron; 2010 Jul 15; 25(11):2534-8. PubMed ID: 20444590.
    Abstract:
    Mercury ions (Hg(2+)) are one of the most dangerous pollutants. Even at low concentration, it causes serious environmental and health problems. Current methods for the detection of Hg(2+) in environmental samples are tedious and time consuming because they require sophisticated instrumentation and complicated sample pre-treatment processes. In this work, a novel probe with high selectivity towards Hg(2+) was synthesized and a one step competitive immunochromatographic assay based on the probe for the detection of Hg(2+) was developed and applied for water samples. The detection conjugate was immobilized on one end of the nitrocellulose membrane (detection line) and anti-BSA polyclonal antibody was immobilized on the other end of the membrane (control line). Hg(2+) in samples competed with the probe to bind with immobilized detection conjugate. The visual detection limit of Hg(2+) in spiked water samples was found to be about 1 ppb. The qualitative assay can be performed within 15 min. The advantages of the technique are rapidity, low cost and without the need of any equipment and complicated sample preparation.
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