Short Description
The laser ablation system (CETAC AnalyteG2, wavelength 193 nm) in combination with an inductively coupled plasma mass spectrometer (ICOMS) is suitable for the (quantitative) determination of the spatial trace element distribution in different sample materials. The main samples intended are thin sections of biological samples and samples of geological interest. The achievable spatial resolution depends on the local concentration of the elements to be analyzed and can be better than 5 μm.
In combination with a highly sensitive ICPMS, the system allows very fast measurements (high laser frequency up to 300 Hz possible), which significantly shortens time-consuming two-dimensional measurements compared to ablation systems with lower frequency (for example, ablation systems with wavelengths from 213 nm frequency to 20 Hz). Under suitable measurement conditions, both continuous and "shot-resolved" measurements with high spatial resolution can be carried out in a short time.
A number of certified reference materials are available for the quantification of geological samples, while the quantification of biological samples is based on the production and measurement of gelatine standards produced in-house. The available software allows the semi-automatic qualitative and quantitative evaluation (on-line) of the data generated by ICPMS.
Contact Person
Jörg Feldmann
Research Services
please enquire
Prof. Dr. J. Feldmann (joerg.feldmann@uni-graz.at)
Dr. Andrea Raab (andrea.raab@uni-graz.at)
Methods & Expertise for Research Infrastructure
The group mainly deals with biological questions, as well as methodical development of the entire laser ablation system in combination with ICPMS. We have experience in both qualitative and quantitative 2-D mapping of biological samples. In addition to the "general" imaging of the trace element distribution in biological samples, the distribution of nanoparticles in these is investigated.
Prof. Dr. J. Feldmann (joerg.feldmann@uni-graz.at)
Dr. Andrea Raab (andrea.raab@uni-graz.at)