期刊
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
卷 25, 期 5, 页码 861-868出版社
AMER CHEMICAL SOC
DOI: 10.1007/s13361-014-0825-z
关键词
Graphene; Mass spectrometry; Mercury; Biosensing; Selective
资金
- National Science Council of Taiwan
We report an extremely sensitive and specific detection of mercuric ions (Hg2+) based on graphene assisted laser desorption/ionization mass spectrometry (GALDI-MS). Combining the highly selective coordination interactions between thymine (T) and Hg2+, we present a simple, effective, and novel approach, based on pi-pi interactions of the T-Hg2+-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 Hg2+ 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 Hg2+ ions.
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