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Detection of Pb2+ Using a Hydrogel Swelling Microcantilever Sensor

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Abstract

Hydrogels containing benzo-18-crown-6 were used to modify microcantilevers for measurements of the concentration of Pb2+ in aqueous solutions. These microcantilevers undergo bending deflection upon exposure to solutions containing various Pb2+ concentrations as the result of a swelling of the hydrogels. It was found that a concentration of 10-6 M Pb2+ can be detected using this technology. Other cations, such as Na+, have no effect on the deflection of this cantilever. The cation K+, which also complexes with benzo-18-crown-6, could interfere with Pb2+ detection, but only at high concentrations (> 10-4 M).

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Authors and Affiliations

  1. Department of Chemistry and Institute for Micromanufacturing, Louisiana Tech University, Ruston, Louisiana, 71272, USA

    Ke Liu & Hai-Feng Ji

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  1. Ke Liu
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  2. Hai-Feng Ji
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Correspondence to Hai-Feng Ji.

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Liu, K., Ji, HF. Detection of Pb2+ Using a Hydrogel Swelling Microcantilever Sensor. ANAL. SCI. 20, 9–11 (2004). https://doi.org/10.2116/analsci.20.9

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  • DOI: https://doi.org/10.2116/analsci.20.9

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