N2 can do - MC-MICAP-MS Combining a microwave-sustained, inductively coupled, atmospheric-pressure nitrogen plasma (MICAP) with multicollector detection

• Applicant: Dr. Marcus Oelze
• Subject Area: Analytical Chemistry
• Term: since 2025
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 564189140

In this project, I present an innovative approach to build a new class of instruments for isotope ratio mass spectrometry by combining a nitrogen-based inductively coupled atmospheric pressure plasma (MICAP) with a multicollector mass spectrometry system. This approach, would be the world’s first system of its kind, aims to overcome the challenges of isobaric interferences, especially from argon, in conventional ICP-MS methods. This combination of a nitrogen-based plasma with multicollector mass spectrometry will improve the detection and analysis of isotopes that are heavily interfered by argon-based interferences, targeting in particular elements such as sulphur, potassium, calcium and selenium. The aim of this project is to perform high-precision measurements of these isotopes, providing valuable insights for a wide range of scientific disciplines. The improved sensitivity and accuracy of this system can improve measurement of these Ar-interfered isotope systems and will continue to open new avenues for in-situ isotope research. The realization of this project will provide important insights for the fields of geochemistry, environmental science, medicine and metrological research. This integration will bring significant advances in the field of mass spectrometry and enable more accurate and cost-effective isotope analysis.

• DFG Programme: Research Grants
• International Connection: Switzerland
• Cooperation Partner: Professor Dr. Detlef Günther