An alternative method to measure carbonate in soils by FT-IR spectroscopy |
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Authors: | M Tatzber M Stemmer H Spiegel C Katzlberger G Haberhauer M H Gerzabek |
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Institution: | (1) Department of Forest and Soil Sciences, Institute of Soil Research, University of Natural Recources and Applied Life Sciences, Peter Jordan Strasse 82, 1190 Vienna, Austria;(2) Austrian Agency for Health and Food Safety, Vienna, Spargelfeldstrasse 191, 1226 Vienna, Austria;(3) ARC Seibersdorf Research GmbH, Department of Environmental Research, 2444 Seibersdorf, Austria |
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Abstract: | Measurements of calcium carbonate contents in soils were performed with FT-IR (Fourier transform infrared) spectroscopy and
with the gas volumetric Scheibler method. To the authors’ knowledge it is the first time that carbonate was quantified in
soil samples by FT-IR spectroscopy. The carbonate contents of the test soils ranged from 11.3 to 13.1%. Both methods gave
similar results, however, results obtained from FT-IR spectra depend on the spectral band used for the carbonate determination.
In our investigation we used the bands at 875 and 2506 cm−1. In case of the band at 2506 cm−1 the difference between FT-IR and Scheibler method was a factor of 1.56, in case of 875 cm−1 the respective factor was 1.16. It can be concluded that FT-IR with both bands has a potential to be used in practice as
substitution of the Scheibler method. The advantages of the FT-IR method are better reproducibility and the simultaneous characterization
of soil organic matter in bulk samples. The disadvantage is its higher cost. |
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Keywords: | Carbonate FT-IR spectroscopy KBr method Soils |
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