Elemental composition determination based on MSn

Elemental composition determination based on MSn

MOTIVATION Identification of metabolites is essential for its use as biomarkers, for research in systems biology and for drug discovery. The first step before a structure can be elucidated is to determine its elemental composition. High-resolution mass spectrometry, which provides the exact mass, together with common constraint rules, for rejecting false proposed elemental compositions, cannot ...

Mass Balance Constraints on the Elemental Composition of the Ocean

Determination of radionuclides and elemental composition of clay soils by gamma- and X-ray spectrometry

Radiochemical and elemental analysis of clay soils collected from different locations within Ekiti State have been performed in this study using gamma and XRF spectrometric measurements. The results of this study show that the mean concentrations of uranium ranged from 2.2 ± 1.0 mg/kg to 3.2 ± 1.1 mg/kg, that of thorium ranged from 4.0 ± 0.5 mg/kg to 5.7 ± 1.7 mg/kg, while potasium presented in...

Effect of bentonite characteristics on the elemental composition of wine.

Physical, chemical, and mineralogical characteristics of six bentonites were assessed and related to their elemental release to wine. Extraction essays of bentonites in wine at three pH levels were carried out. The multielemental analysis of bentonites and wines was performed by atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). Bentonite addition re...

Elemental Analysis as a Strong Tool for the Determination of Gallstones Composition

Elemental analysis of C, H, N, S and Ca was used for the classification of gallstones from 94 patients from the Western Region of Saudi Arabia. Fourier transform infrared spectroscopy (FT-IR) was used to provide rapid qualitative information about the gallstones composition. The density, color and surface of the stones were found to give a good indication of stones composition. From the studies...