Nano-SIMS for soil science - exploring elemental distribution, formation and properties of submicron sized particles in soils

• Applicant: Professorin Dr. Ingrid Kögel-Knabner
• Subject Area: Soil Sciences
• Term: from 2009 to 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 119111086

We apply for a NanoSIMS 50L ion microprobe instrument for the analysis of soil biogeochemical properties. The specific features of the novel NanoSIMS 50L microprobe technology with the simultaneous analysis of up to seven ion species with high sensitivity and resolution make it an unprecedented tool for the analysis of biogeochemical processes and properties of soils and thereby will boost our ability to locate the association of elements/isotopes in soil structural components at the submicron scale, especially in combination with well-established labelling techniques. NanoSIMS will thus help to unravel the heterogeneous composition and three-dimensional architecture of submicron sized organo-mineral associations in soils. Our research will first focus on the simultaneous analysis of the spatial distribution of C, N, Si and Fe in organo-mineral associations and in a second step be applied to labelling studies: This unique combination provides one of the most promising approaches for exploring the C and N cycle of soils at a resolution not possible before. The NanoSIMS technique introduces new scales to combined multielement and isotope measurements at the submicron scale and thus will allow a major step forward in the understanding of soil formation, with significant implications for our concepts of the soil C and N cycle, soil structural stability, and the sorptive properties of the soil interface.

• DFG Programme: Research Grants
• Major Instrumentation: Ion Microprobe NanoSIMS 50 L
• Instrumentation Group: 1720 Spezielle Massenspektrometer (Flugzeit-, Cyclotronresonanz-, Ionensonden, SIMS, außer 306)