Development and validation of seaFAST-ICP-QMS method for determination of rare earth elements total concentrations in natural mineral waters.

The method for determination of rare earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) total concentrations in mineral waters was developed and validated. The proposed method comprised inductively coupled plasma mass spectrometry (ICP-MS) detection and the 10-fold off-line REE preconcentration. To improve the method sensitivity and selectivity, the major matrix components and elements causing severe spectral interferences (Ba and Sr) were removed by the seaFAST-pico chromatographic system.

AgF desalination procedure for the routine determination of oxygen and hydrogen isotopic composition of saline waters and brines.

The routine methods for stable oxygen and hydrogen isotope analysis of water involve water-CO gas equilibration and water reduction on hot metal (e.g. Zn, Cr, U) and subsequent mass spectrometric analysis of the evolved gases of CO and H for O/O and H/H ratios, respectively.

Determination of delta2H and delta18O in saline oil-associated waters: the question of simple vacuum distillation of water samples prior to isotopic analyses.

The paper deals with analytical and procedural aspects of delta18O and delta2H determination in saline oil-associated waters. The main objective of the study was to show experimentally the qualitative and quantitative applicability of the simple vacuum distillation of saline oil-associated waters while routine procedures of water isotopic analyses are applied. Additionally, two standard off-line techniques of delta2H determination in water - the zinc and the chromium method - have been compared.