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Nano-FTIR: Analysis of chondrules

Nano-FTIR: Analysis of chondrules

Chondrule_výřez jiné barvy

FT-IR spectroscopy has traditionally been used to determine the chemical composition of rocks and minerals. Its applications range from the analysis of powder samples to the mapping of larger cross-sectional areas using imaging spectroscopy. Therefore, it is not surprising that the nano-FTIR method is also suitable for geological samples.

Undoubtedly, chondrules are among the most interesting geological specimens. These are stone meteorites containing grains of molten minerals that were formed at the time when our solar system was formed, so they are very important witnesses of our solar system and can tell us what conditions prevailed here at the time of its formation.

In addition to the precise determination of the inorganic components of chondrules, nano-FTIR is also a useful tool for their organic components. Such findings are essential, among other things, for research of theories about the origin of life on Earth.

(a) Chemical map of a chondrule sample measured by micro-FTIR superimposed over a mosaic obtained by the reflectance measurement method, (b) FT-IR spectra of the main components of the sample


Chemical map of the selected sample area. Individual color channels (green, blue, red) represent the relative representation of different components according to the spectral bands 944, 1039 and 1081 cm-1


Nano-FTIR spectra: (a) amplitude and (b) phase of the region of interest on the fine-grained sample. These spectra can provide another set of information about the sample that we would not obtain using classical FT-IR spectroscopy.

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