2D elemental mapping of micrometeorites via LA-ICP-tof-MS
Research output: Contribution to conference › Abstract
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- Vrije Universiteit Brussel
- Department of Materials Science and Engineering, Ghent University
Abstract
Micrometeorites, tiny extraterrestrial particles, largely produced by collisions of celestial bodies, which survived atmospheric entry, fall on Earth at a rate of 40000 tons annually, and can be retrieved on the Antarctic. Micrometeorites represent a valuable source of information on the chemical evolution of the Solar System. Their microscopic size (50-2000 m) warrants the use of novel in situ mapping techniques of elemental analysis. Hyphenated with a low-dispersion laser ablation (LA) system, ICP-ToF-MS allows for 2D mapping at several hundred hertz, with each laser shot recorded as a single pixel, and for quasi-simultaneous rapid acquisition of almost the entire periodic table.
In this contribution we present approaches for and results of high-resolution multi-element 2D mapping of micrometeorites cross-sections via LA-ICP-ToF-MS. Quantitative data for each pixel was obtained through a combination of multi-point calibration - via a set of natural glass reference materials - and 100% oxide normalization to account for ablation yield. variations. Detection limits down to a few ng/g were attained while only using a 5x5 µm square laser spot. Analysis of the elemental images of micrometeorites allows to recognize and isolate melts of different composition, complimenting petrographic observations.
In this contribution we present approaches for and results of high-resolution multi-element 2D mapping of micrometeorites cross-sections via LA-ICP-ToF-MS. Quantitative data for each pixel was obtained through a combination of multi-point calibration - via a set of natural glass reference materials - and 100% oxide normalization to account for ablation yield. variations. Detection limits down to a few ng/g were attained while only using a 5x5 µm square laser spot. Analysis of the elemental images of micrometeorites allows to recognize and isolate melts of different composition, complimenting petrographic observations.
Details
Original language | English |
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Publication status | Published - 2023 |
Event | European Winter Conference on Plasma Spectrochemistry, Ljubljana, Slovenia - Ljubljana, Slovenia Duration: 29 Jan 2023 → 3 Feb 2023 Conference number: 19 https://ewcps2023.si/ |
Conference
Conference | European Winter Conference on Plasma Spectrochemistry, Ljubljana, Slovenia |
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Abbreviated title | EWCPS 2023 |
Country/Territory | Slovenia |
City | Ljubljana |
Period | 29/01/23 → 3/02/23 |
Internet address |