Abstract
The aim of this work was to develop a simple and fast high performance liquid chromatography–inductively coupled argon plasma (ICP) mass spectrometry (MS) method capable of separating and detecting the two volatile selenium species dimethyl selenide (DMeSe) and dimethyl diselenide (DMeDSe) in biological samples. Dimethyl selenide and dimethyl diselenide were separated on a short reversed phase column using an eluent containing 40% methanol and detected by dynamic reaction cell ICP-MS monitoring the 80Se isotope. The limit of detection was 8 nM for both species (corresponding to 0.6 and 1.3 μg Se/L for DMeDSe and DMeSe, respectively). Both compounds exhibited a linear signal–concentration relationship in the investigated concentration range of 0.1–1 μM with a precision on the determinations better than 3%. The method was applied for analysis of samples from cancer cell lines incubated with methylseleninic acid, selenomethionine, Se-methylselenocysteine, and sodium selenite. DMeDSe were detected in some samples. The method offers a simple and fast analysis of DMeDSe and DMeSe using standard liquid chromatography coupled with ICP-MS equipment and interfacing.



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Lunøe, K., Skov, S., Gabel-Jensen, C. et al. A method for analysis of dimethyl selenide and dimethyl diselenide by LC-ICP-DRC-MS. Anal Bioanal Chem 398, 3081–3086 (2010). https://doi.org/10.1007/s00216-010-4242-2
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DOI: https://doi.org/10.1007/s00216-010-4242-2


