Abstract
We demonstrated the complementary use of inductively coupled plasma-mass spectrometry (ICP-MS) and electrospray ionization quadrupole time-of-flight mass spectrometry (ESI-Q-TOF-MS) for the analysis of Se-containing compounds, such as selenate, selenomethionine (SeMet), and trimethylselenonium ion (TMSe), found in biological samples. The sensitivity of ESI-Q-TOF-MS for Se-containing compounds was strongly dependent on the chemical species. ICP-MS exhibited higher sensitivity than ESI-Q-TOF-MS, and had no species dependency. On the other hand, ESI-Q-TOF-MS enabled easy and robust identification of Se-containing compounds.
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