In this work it has been shown that both the laser desorption/ionization mass
spectrometry (LDI MS) and the matrix assisted laser desorption/ionization
time-of-flight mass spectrometry (MALDI TOF MS) are the simple and quick
methods for determination of relative natural isotopic distribution of lead.
The analysis of metal salts with these approaches does not require any
time-consuming preparation of samples: a single run can take only a minute,
and numerous information can be obtained. Results obtained in this work show
that chosen matrix has no negative effect on quantitative determination of
lead isotopes and support once more the applicability of MALDI TOF MS for
lead isotope distribution determination in the sample, and accuracy of data
obtained. Additionally, the generation of PbnOn and PbnOn-1 (n: 2 - 6)
clusters have been successfully achieved in the positive mode, using the both
LDI and MALDI methods. All stoichiometries were confirmed using isotopic
pattern modelling.
Characterization of Klebsiella isolates by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and determination of antimicrobial resistance with VITEK 2 advanced expert system (AES)
