Quantitative separation of calcium from magnesium, aluminium, iron(III) and many other elements by cation-exchange chromatography in methanolic hydrochloric acid on a macroporous resin

High-precision Mg-isotope measurements of terrestrial and extraterrestrial material by HR-MC-ICPMS—implications for the relative and absolute Mg-isotope composition of the bulk silicate Earth

“…Magnesium is the sixth most abundant element in the sun, 1 and one of the most important rock-forming constituents of planets from the inner solar system. Magnesium has three naturally occurring isotopes - 24 Mg, 25 Mg and 26 Mg -with relative abundances of $79%, 10% and 11%, respectively. Variations in the isotopic composition of Mg can potentially occur in solar system materials through a number of processes including (1) stellar nucleosynthesis, (2) the former presence and decay of the 26 Al nuclide (half-life ¼ 0.73 myr) and (3) mass-dependent isotopic fractionation during high-temperature processes such as partial evaporation/condensation as well as from low-temperature fluid/ rock interactions (e.g.…”

“…aqueous alteration in carbonaceous chondrites). Thus, studying the potential variability of 26 Mg/ 24 Mg and 25 Mg/ 24 Mg ratios in solar system solids can be used to infer genetic relationships between early solar system reservoirs and terrestrial planets.…”

“…Until recently, Mg-isotope studies have largely focused on the search for the presence of live 26 Al in early solar system objects and its use as a high-resolution early solar system chronometer, [2][3][4] or on the detection of mass-independent anomalous effects. 5,6 With the advent of multi-collector inductively coupled mass spectrometry (MC-ICP-MS), however, it is now possible to routinely measure Mg-isotopes with greatly improved precision compared to traditional techniques such as thermal ionization mass spectrometry (TIMS) or secondary ionization mass spectrometry (SIMS).…”

Chromatographic separations and recovery of lead ions from a synthetic binary mixtures of some heavy metal using cation exchange resin

“…The separation factor describes the selectivity of extractant between two metals. Separation factors,˛were calculated from the following equation [25]: Table 2 illustrates that the highest separation factor of Pb(II) from Fe(III)˛P b Fe = 8.569 is obtained in the presence of 2 M nitric acid, thus it was the most effective concentration for the elution and separation of lead from iron. …”

Solid-Phase Extractors Based on 8-Aminoquinoline and 2-Aminopyridine Covalently Bonded to Silica Gel for the Selective Separation and Determination of Calcium in Natural Water and Pharmaceutical Samples

“…In the past, several papers have appeared concerning the separation of calcium and magnesium by using ion-exchanger chromatography. [14][15][16] Recently, other papers discussed the determination of calcium and magnesium in the presence of each other using different techniques. [17][18][19] Researchers are thus focusing on using an important technique that has many advantages, called solid phase extraction (SPE) for the determination of these two selected metal ions in the presence of each other.…”