Pushing the limits of mercury sensors with gold nanorods

    Authors

    M. Rex; F. E. Hernandez;A. D. Campiglia

    Comments

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    Abbreviated Journal Title

    Anal. Chem.

    Keywords

    FLOW-INJECTION SYSTEM; PIEZOELECTRIC DETECTION; INORGANIC MERCURY; TRACE; MERCURY; VAPOR; FILMS; ADSORPTION; SURFACE; WATER; PRECONCENTRATION; Chemistry, Analytical

    Abstract

    The method presented here provides a direct way to determine mercury in tap water samples at the parts-per-trillion level. Its outstanding selectivity and sensitivity results from the well-known amalgamation process that occurs between mercury and gold. The entire procedure takes less than 10 min. No sample separation or sample preconcentration is required. The only step prior to mercury determination consists of mixing the water sample with a gold nanorod solution in sodium borohydride. The analytical figures of merit demonstrate precise and accurate analysis at the parts-per-trillion level. The limit of detection (6.6 x 10(-13) g(.)L(-1)) shows excellent potential for monitoring ultralow levels of mercury in water samples.

    Journal Title

    Analytical Chemistry

    Volume

    78

    Issue/Number

    2

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    445

    Last Page

    451

    WOS Identifier

    WOS:000234826400012

    ISSN

    0003-2700

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