Analyses of lithium-doped and pure magnesium diboride using ultraviolet nano- and femtosecond laser ablation inductively coupled plasma mass spectrometry

作者：Waelle M; Koch J; Tabersky D; Hametner K; Zhigadlo N D; Katrych S; Karpinski J; Guenther D^*

来源：Journal of Analytical Atomic Spectrometry, 2010, 25(2): 193-195.

DOI：10.1039/b914547h

Lithium-doped and pure magnesium diboride crystals were quantified by nanosecond and femtosecond laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). In both cases, non-matrix matched calibration using a silicate glass (NIST SRM 610) was performed. The application of nanosecond LA-ICP-MS resulted in a boron and magnesium stoichiometry of MgB. In contrast, data obtained by femtosecond LA-ICP-MS indicate a boron and magnesium stoichiometry of MgB(2), which was supported by supplementary measurements on the basis of X-ray diffraction using peak refinement. Concentration discrepancies of main constituents that suggest a wrong stoichiometry, as found for ns-LA-ICP-MS, have not yet been reported and can, therefore, be considered an example of extreme laser-induced elemental fractionation.

• 出版日期2010