Development of antibody-labelled superparamagnetic nanoparticles for the visualisation of benzo[a]pyrene in porous media with magnetic resonance imaging |
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Authors: | Martin Rieger Gabriele E Schaumann Yamuna Kunhi Mouvenchery Reinhard Niessner Michael Seidel Thomas Baumann |
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Institution: | Institute of Hydrochemistry, TUM, Munich, Germany. |
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Abstract: | Biogeochemical interfaces in soil are dynamic in the spatial and temporal domain and require advanced visualisation and quantification tools to link in vitro experiments with natural systems. This study presents the development, characterization and application of functional nanoparticles coated with monoclonal antibodies to visualise the distribution of benzoa]pyrene in porous media using magnetic resonance imaging. The labelled particles are 450 nm in diameter and interact with benzoa]pyrene covalently bound to silanized silica gel. They did not bind to benzoa]pyrene adsorbed to plain silica gel. Although unspecific filtration was low, washing steps are required for visualisation. The ability to visualise benzoa]pyrene is inversely correlated to the heterogeneity of the soil materials. There are access restrictions to narrow pore spaces which allow the visualisation of only those pathways which are also accessible to bacteria and hydrocolloids. The production of the particles is applicable to other antibodies which extends the range of potential target contaminants. |
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