We explore the so-called „non-traditional“ stable isotopes, of which the minor shifts by isotope fractionation have been made detectable by multicollector ICP-mass spectrometry. These are for example the elements lithium, magnesium, silicon, calcium or iron. • Why do isotopes shift their relative abundances? Principles of mass-dependent isotope fractionation. Isotope fractionation during precipitation, mineral dissolution, weathering, uptake by higher plants, biomedical applications, the hydrosphere, and formation of the planets. Basics of MC-ICP-mass spectrometry: sample preparation, ionisation, ion optics and mass separation, detection systems, data evaluation.

Lectures will deal with applications (isotope fractionation in nature: rocks, weathering, rivers, plants, human nutrition)

Practicals will be daily and will use sophisticated clean labs and mass spectrometry equipment (multicollector ICP Ms) at GFZ Potsdam. Participants will do a small scientific project.