Ultrasensitive, rapid, and selective detection of mercury using graphene assisted laser desorption/ionization mass spectrometry. Abdelhamid, H., N. & Wu, H. Journal of the American Society for Mass Spectrometry, 25(5):861-8, 5, 2014.
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Paper Website abstract bibtex We report an extremely sensitive and specific detection of mercuric ions (Hg(2+)) based on graphene assisted laser desorption/ionization mass spectrometry (GALDI-MS). Combining the highly selective coordination interactions between thymine (T) and Hg(2+), we present a simple, effective, and novel approach, based on π-π interactions of the T-Hg(2+)-T complex and G that can serve as a platform and matrix for GALDI-MS. The present sensor not only exhibits high selectivity and sensitivity (picomolar) to Hg(2+) in aqueous solution, but also can elucidate the chemical structures of the metal complexes. The significant advantage in the current approach is that there is no need for a sophisticated instrument, and no sample pretreatment is required to detect the Hg(2+) ions.
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abstract = {We report an extremely sensitive and specific detection of mercuric ions (Hg(2+)) based on graphene assisted laser desorption/ionization mass spectrometry (GALDI-MS). Combining the highly selective coordination interactions between thymine (T) and Hg(2+), we present a simple, effective, and novel approach, based on π-π interactions of the T-Hg(2+)-T complex and G that can serve as a platform and matrix for GALDI-MS. The present sensor not only exhibits high selectivity and sensitivity (picomolar) to Hg(2+) in aqueous solution, but also can elucidate the chemical structures of the metal complexes. The significant advantage in the current approach is that there is no need for a sophisticated instrument, and no sample pretreatment is required to detect the Hg(2+) ions.},
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